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Finding the Fourth Proportional to 71,008.20, 97,689.42 and 69,039.90

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Solution

The fourth proportional to 71,008.20, 97,689.42 and 69,039.90 is: 94,981.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,008.20 : 97,689.42 = 69,039.90 : x
  2. Step 2: Convert to fraction form
    71,008.20/97,689.42 = 69,039.90/x
  3. Step 3: Cross multiply
    71,008.20x = 97,689.42 × 69,039.90
  4. Step 4: Simplify right side
    71,008.20x = 6,744,467,787.86
  5. Step 5: Solve for x
    x = 6,744,467,787.86/71,008.20
  6. Step 6: Final answer
    x = 94,981.53

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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.