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Finding the Fourth Proportional to 503,103, 754,654.56 and 129,126

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Solution

The fourth proportional to 503,103, 754,654.56 and 129,126 is: 193,689.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,103 : 754,654.56 = 129,126 : x
  2. Step 2: Convert to fraction form
    503,103/754,654.56 = 129,126/x
  3. Step 3: Cross multiply
    503,103x = 754,654.56 × 129,126
  4. Step 4: Simplify right side
    503,103x = 97,445,524,714.56
  5. Step 5: Solve for x
    x = 97,445,524,714.56/503,103
  6. Step 6: Final answer
    x = 193,689.02

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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.