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Finding the Fourth Proportional to 138,865.60, 191,634.60 and 75,203.68

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Solution

The fourth proportional to 138,865.60, 191,634.60 and 75,203.68 is: 103,781.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,865.60 : 191,634.60 = 75,203.68 : x
  2. Step 2: Convert to fraction form
    138,865.60/191,634.60 = 75,203.68/x
  3. Step 3: Cross multiply
    138,865.60x = 191,634.60 × 75,203.68
  4. Step 4: Simplify right side
    138,865.60x = 14,411,627,135.33
  5. Step 5: Solve for x
    x = 14,411,627,135.33/138,865.60
  6. Step 6: Final answer
    x = 103,781.12

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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.