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Finding the Fourth Proportional to 103,655.43, 155,789.87 and 86,000.60

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Solution

The fourth proportional to 103,655.43, 155,789.87 and 86,000.60 is: 129,255.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,655.43 : 155,789.87 = 86,000.60 : x
  2. Step 2: Convert to fraction form
    103,655.43/155,789.87 = 86,000.60/x
  3. Step 3: Cross multiply
    103,655.43x = 155,789.87 × 86,000.60
  4. Step 4: Simplify right side
    103,655.43x = 13,398,022,253.39
  5. Step 5: Solve for x
    x = 13,398,022,253.39/103,655.43
  6. Step 6: Final answer
    x = 129,255.38

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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.