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Finding the Fourth Proportional to 91,472.40, 137,500.20 and 86,223.60

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Solution

The fourth proportional to 91,472.40, 137,500.20 and 86,223.60 is: 129,610.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,472.40 : 137,500.20 = 86,223.60 : x
  2. Step 2: Convert to fraction form
    91,472.40/137,500.20 = 86,223.60/x
  3. Step 3: Cross multiply
    91,472.40x = 137,500.20 × 86,223.60
  4. Step 4: Simplify right side
    91,472.40x = 11,855,762,244.72
  5. Step 5: Solve for x
    x = 11,855,762,244.72/91,472.40
  6. Step 6: Final answer
    x = 129,610.27

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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.