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Finding the Fourth Proportional to 72,636.38, 100,248.54 and 40,807.43

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Solution

The fourth proportional to 72,636.38, 100,248.54 and 40,807.43 is: 56,320.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,636.38 : 100,248.54 = 40,807.43 : x
  2. Step 2: Convert to fraction form
    72,636.38/100,248.54 = 40,807.43/x
  3. Step 3: Cross multiply
    72,636.38x = 100,248.54 × 40,807.43
  4. Step 4: Simplify right side
    72,636.38x = 4,090,885,278.65
  5. Step 5: Solve for x
    x = 4,090,885,278.65/72,636.38
  6. Step 6: Final answer
    x = 56,320.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.