Home / 85,536,014.40-128,304,021.60-76,876,660.80

Finding the Fourth Proportional to 85,536,014.40, 128,304,021.60 and 76,876,660.80

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Solution

The fourth proportional to 85,536,014.40, 128,304,021.60 and 76,876,660.80 is: 115,314,991.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,536,014.40 : 128,304,021.60 = 76,876,660.80 : x
  2. Step 2: Convert to fraction form
    85,536,014.40/128,304,021.60 = 76,876,660.80/x
  3. Step 3: Cross multiply
    85,536,014.40x = 128,304,021.60 × 76,876,660.80
  4. Step 4: Simplify right side
    85,536,014.40x = 9,863,584,747,819,072
  5. Step 5: Solve for x
    x = 9,863,584,747,819,072/85,536,014.40
  6. Step 6: Final answer
    x = 115,314,991.20

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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.