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Finding the Fourth Proportional to 101,691.42, 140,337.78 and 61,397.37

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Solution

The fourth proportional to 101,691.42, 140,337.78 and 61,397.37 is: 84,730.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,691.42 : 140,337.78 = 61,397.37 : x
  2. Step 2: Convert to fraction form
    101,691.42/140,337.78 = 61,397.37/x
  3. Step 3: Cross multiply
    101,691.42x = 140,337.78 × 61,397.37
  4. Step 4: Simplify right side
    101,691.42x = 8,616,370,603.64
  5. Step 5: Solve for x
    x = 8,616,370,603.64/101,691.42
  6. Step 6: Final answer
    x = 84,730.56

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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.