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Finding the Fourth Proportional to 136,925.70, 188,938.77 and 76,488.87

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Solution

The fourth proportional to 136,925.70, 188,938.77 and 76,488.87 is: 105,544.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,925.70 : 188,938.77 = 76,488.87 : x
  2. Step 2: Convert to fraction form
    136,925.70/188,938.77 = 76,488.87/x
  3. Step 3: Cross multiply
    136,925.70x = 188,938.77 × 76,488.87
  4. Step 4: Simplify right side
    136,925.70x = 14,451,713,016.49
  5. Step 5: Solve for x
    x = 14,451,713,016.49/136,925.70
  6. Step 6: Final answer
    x = 105,544.20

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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.