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Finding the Fourth Proportional to 71,038.60, 106,553.71 and 26,661.63

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Solution

The fourth proportional to 71,038.60, 106,553.71 and 26,661.63 is: 39,990.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,038.60 : 106,553.71 = 26,661.63 : x
  2. Step 2: Convert to fraction form
    71,038.60/106,553.71 = 26,661.63/x
  3. Step 3: Cross multiply
    71,038.60x = 106,553.71 × 26,661.63
  4. Step 4: Simplify right side
    71,038.60x = 2,840,895,591.15
  5. Step 5: Solve for x
    x = 2,840,895,591.15/71,038.60
  6. Step 6: Final answer
    x = 39,990.87

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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.