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Finding the Fourth Proportional to 71,060.94, 106,572.81 and 21,127.59

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Solution

The fourth proportional to 71,060.94, 106,572.81 and 21,127.59 is: 31,685.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,060.94 : 106,572.81 = 21,127.59 : x
  2. Step 2: Convert to fraction form
    71,060.94/106,572.81 = 21,127.59/x
  3. Step 3: Cross multiply
    71,060.94x = 106,572.81 × 21,127.59
  4. Step 4: Simplify right side
    71,060.94x = 2,251,626,634.83
  5. Step 5: Solve for x
    x = 2,251,626,634.83/71,060.94
  6. Step 6: Final answer
    x = 31,685.85

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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.