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Finding the Fourth Proportional to 129,115.80, 193,673.70 and 35,621.40

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Solution

The fourth proportional to 129,115.80, 193,673.70 and 35,621.40 is: 53,432.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,115.80 : 193,673.70 = 35,621.40 : x
  2. Step 2: Convert to fraction form
    129,115.80/193,673.70 = 35,621.40/x
  3. Step 3: Cross multiply
    129,115.80x = 193,673.70 × 35,621.40
  4. Step 4: Simplify right side
    129,115.80x = 6,898,928,337.18
  5. Step 5: Solve for x
    x = 6,898,928,337.18/129,115.80
  6. Step 6: Final answer
    x = 53,432.10

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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.