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Finding the Fourth Proportional to 72,428.70, 108,646.41 and 37,436.70

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Solution

The fourth proportional to 72,428.70, 108,646.41 and 37,436.70 is: 56,156.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,428.70 : 108,646.41 = 37,436.70 : x
  2. Step 2: Convert to fraction form
    72,428.70/108,646.41 = 37,436.70/x
  3. Step 3: Cross multiply
    72,428.70x = 108,646.41 × 37,436.70
  4. Step 4: Simplify right side
    72,428.70x = 4,067,363,057.25
  5. Step 5: Solve for x
    x = 4,067,363,057.25/72,428.70
  6. Step 6: Final answer
    x = 56,156.79

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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.