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Finding the Fourth Proportional to 136,565.89, 188,502.59 and 79,219.71

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Solution

The fourth proportional to 136,565.89, 188,502.59 and 79,219.71 is: 109,347.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,565.89 : 188,502.59 = 79,219.71 : x
  2. Step 2: Convert to fraction form
    136,565.89/188,502.59 = 79,219.71/x
  3. Step 3: Cross multiply
    136,565.89x = 188,502.59 × 79,219.71
  4. Step 4: Simplify right side
    136,565.89x = 14,933,120,712.10
  5. Step 5: Solve for x
    x = 14,933,120,712.10/136,565.89
  6. Step 6: Final answer
    x = 109,347.37

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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.