Home / 85,536,000.90-128,304,001.35-76,876,647.30

Finding the Fourth Proportional to 85,536,000.90, 128,304,001.35 and 76,876,647.30

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Solution

The fourth proportional to 85,536,000.90, 128,304,001.35 and 76,876,647.30 is: 115,314,970.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,536,000.90 : 128,304,001.35 = 76,876,647.30 : x
  2. Step 2: Convert to fraction form
    85,536,000.90/128,304,001.35 = 76,876,647.30/x
  3. Step 3: Cross multiply
    85,536,000.90x = 128,304,001.35 × 76,876,647.30
  4. Step 4: Simplify right side
    85,536,000.90x = 9,863,581,458,962,674
  5. Step 5: Solve for x
    x = 9,863,581,458,962,674/85,536,000.90
  6. Step 6: Final answer
    x = 115,314,970.95

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.