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Finding the Fourth Proportional to 136,909.59, 188,924.31 and 76,475.49

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Solution

The fourth proportional to 136,909.59, 188,924.31 and 76,475.49 is: 105,530.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,909.59 : 188,924.31 = 76,475.49 : x
  2. Step 2: Convert to fraction form
    136,909.59/188,924.31 = 76,475.49/x
  3. Step 3: Cross multiply
    136,909.59x = 188,924.31 × 76,475.49
  4. Step 4: Simplify right side
    136,909.59x = 14,448,079,180.16
  5. Step 5: Solve for x
    x = 14,448,079,180.16/136,909.59
  6. Step 6: Final answer
    x = 105,530.07

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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.