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Finding the Fourth Proportional to 129,877.56, 194,837.76 and 45,615.78

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Solution

The fourth proportional to 129,877.56, 194,837.76 and 45,615.78 is: 68,431.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,877.56 : 194,837.76 = 45,615.78 : x
  2. Step 2: Convert to fraction form
    129,877.56/194,837.76 = 45,615.78/x
  3. Step 3: Cross multiply
    129,877.56x = 194,837.76 × 45,615.78
  4. Step 4: Simplify right side
    129,877.56x = 8,887,676,395.85
  5. Step 5: Solve for x
    x = 8,887,676,395.85/129,877.56
  6. Step 6: Final answer
    x = 68,431.19

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1.5x scale

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.