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Finding the Fourth Proportional to 71,438.88, 98,585.19 and 39,607.77

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Solution

The fourth proportional to 71,438.88, 98,585.19 and 39,607.77 is: 54,658.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,438.88 : 98,585.19 = 39,607.77 : x
  2. Step 2: Convert to fraction form
    71,438.88/98,585.19 = 39,607.77/x
  3. Step 3: Cross multiply
    71,438.88x = 98,585.19 × 39,607.77
  4. Step 4: Simplify right side
    71,438.88x = 3,904,739,530.93
  5. Step 5: Solve for x
    x = 3,904,739,530.93/71,438.88
  6. Step 6: Final answer
    x = 54,658.47

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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.