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Finding the Fourth Proportional to 136,761.59, 188,712.17 and 76,326.57

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Solution

The fourth proportional to 136,761.59, 188,712.17 and 76,326.57 is: 105,320.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,761.59 : 188,712.17 = 76,326.57 : x
  2. Step 2: Convert to fraction form
    136,761.59/188,712.17 = 76,326.57/x
  3. Step 3: Cross multiply
    136,761.59x = 188,712.17 × 76,326.57
  4. Step 4: Simplify right side
    136,761.59x = 14,403,752,271.72
  5. Step 5: Solve for x
    x = 14,403,752,271.72/136,761.59
  6. Step 6: Final answer
    x = 105,320.16

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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.