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Finding the Fourth Proportional to 136,078.60, 187,791.60 and 75,646.94

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Solution

The fourth proportional to 136,078.60, 187,791.60 and 75,646.94 is: 104,394.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,078.60 : 187,791.60 = 75,646.94 : x
  2. Step 2: Convert to fraction form
    136,078.60/187,791.60 = 75,646.94/x
  3. Step 3: Cross multiply
    136,078.60x = 187,791.60 × 75,646.94
  4. Step 4: Simplify right side
    136,078.60x = 14,205,859,897.70
  5. Step 5: Solve for x
    x = 14,205,859,897.70/136,078.60
  6. Step 6: Final answer
    x = 104,394.52

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1.5x scale

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.