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Finding the Fourth Proportional to 72,006.31, 108,103.02 and 55,378.12

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Solution

The fourth proportional to 72,006.31, 108,103.02 and 55,378.12 is: 83,139.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,006.31 : 108,103.02 = 55,378.12 : x
  2. Step 2: Convert to fraction form
    72,006.31/108,103.02 = 55,378.12/x
  3. Step 3: Cross multiply
    72,006.31x = 108,103.02 × 55,378.12
  4. Step 4: Simplify right side
    72,006.31x = 5,986,541,737.03
  5. Step 5: Solve for x
    x = 5,986,541,737.03/72,006.31
  6. Step 6: Final answer
    x = 83,139.13

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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.