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Finding the Fourth Proportional to 129,305.55, 193,958.54 and 40,565.87

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Solution

The fourth proportional to 129,305.55, 193,958.54 and 40,565.87 is: 60,848.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,305.55 : 193,958.54 = 40,565.87 : x
  2. Step 2: Convert to fraction form
    129,305.55/193,958.54 = 40,565.87/x
  3. Step 3: Cross multiply
    129,305.55x = 193,958.54 × 40,565.87
  4. Step 4: Simplify right side
    129,305.55x = 7,868,095,746.41
  5. Step 5: Solve for x
    x = 7,868,095,746.41/129,305.55
  6. Step 6: Final answer
    x = 60,848.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.