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Finding the Fourth Proportional to 129,402.01, 194,090.19 and 40,653.15

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Solution

The fourth proportional to 129,402.01, 194,090.19 and 40,653.15 is: 60,975.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,402.01 : 194,090.19 = 40,653.15 : x
  2. Step 2: Convert to fraction form
    129,402.01/194,090.19 = 40,653.15/x
  3. Step 3: Cross multiply
    129,402.01x = 194,090.19 × 40,653.15
  4. Step 4: Simplify right side
    129,402.01x = 7,890,377,607.60
  5. Step 5: Solve for x
    x = 7,890,377,607.60/129,402.01
  6. Step 6: Final answer
    x = 60,975.70

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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.