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Finding the Fourth Proportional to 168,911.31, 253,373.45 and 75,417.87

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Solution

The fourth proportional to 168,911.31, 253,373.45 and 75,417.87 is: 113,129.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,911.31 : 253,373.45 = 75,417.87 : x
  2. Step 2: Convert to fraction form
    168,911.31/253,373.45 = 75,417.87/x
  3. Step 3: Cross multiply
    168,911.31x = 253,373.45 × 75,417.87
  4. Step 4: Simplify right side
    168,911.31x = 19,108,885,536.46
  5. Step 5: Solve for x
    x = 19,108,885,536.46/168,911.31
  6. Step 6: Final answer
    x = 113,129.70

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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.