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Finding the Fourth Proportional to 103,655.28, 155,294.28 and 71,998.46

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Solution

The fourth proportional to 103,655.28, 155,294.28 and 71,998.46 is: 107,866.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,655.28 : 155,294.28 = 71,998.46 : x
  2. Step 2: Convert to fraction form
    103,655.28/155,294.28 = 71,998.46/x
  3. Step 3: Cross multiply
    103,655.28x = 155,294.28 × 71,998.46
  4. Step 4: Simplify right side
    103,655.28x = 11,180,949,006.81
  5. Step 5: Solve for x
    x = 11,180,949,006.81/103,655.28
  6. Step 6: Final answer
    x = 107,866.66

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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.