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Finding the Fourth Proportional to 85,325.60, 127,988.40 and 48,000.80

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Solution

The fourth proportional to 85,325.60, 127,988.40 and 48,000.80 is: 72,001.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,325.60 : 127,988.40 = 48,000.80 : x
  2. Step 2: Convert to fraction form
    85,325.60/127,988.40 = 48,000.80/x
  3. Step 3: Cross multiply
    85,325.60x = 127,988.40 × 48,000.80
  4. Step 4: Simplify right side
    85,325.60x = 6,143,545,590.72
  5. Step 5: Solve for x
    x = 6,143,545,590.72/85,325.60
  6. Step 6: Final answer
    x = 72,001.20

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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.