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Finding the Fourth Proportional to 101,319.78, 139,838.66 and 58,902.92

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Solution

The fourth proportional to 101,319.78, 139,838.66 and 58,902.92 is: 81,296.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,319.78 : 139,838.66 = 58,902.92 : x
  2. Step 2: Convert to fraction form
    101,319.78/139,838.66 = 58,902.92/x
  3. Step 3: Cross multiply
    101,319.78x = 139,838.66 × 58,902.92
  4. Step 4: Simplify right side
    101,319.78x = 8,236,904,630.07
  5. Step 5: Solve for x
    x = 8,236,904,630.07/101,319.78
  6. Step 6: Final answer
    x = 81,296.12

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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.