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Finding the Fourth Proportional to 72,569.94, 100,139.67 and 40,732.62

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Solution

The fourth proportional to 72,569.94, 100,139.67 and 40,732.62 is: 56,207.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,569.94 : 100,139.67 = 40,732.62 : x
  2. Step 2: Convert to fraction form
    72,569.94/100,139.67 = 40,732.62/x
  3. Step 3: Cross multiply
    72,569.94x = 100,139.67 × 40,732.62
  4. Step 4: Simplify right side
    72,569.94x = 4,078,951,125.04
  5. Step 5: Solve for x
    x = 4,078,951,125.04/72,569.94
  6. Step 6: Final answer
    x = 56,207.17

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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.