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Finding the Fourth Proportional to 94,687.80, 142,031.70 and 53,129.40

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Solution

The fourth proportional to 94,687.80, 142,031.70 and 53,129.40 is: 79,694.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,687.80 : 142,031.70 = 53,129.40 : x
  2. Step 2: Convert to fraction form
    94,687.80/142,031.70 = 53,129.40/x
  3. Step 3: Cross multiply
    94,687.80x = 142,031.70 × 53,129.40
  4. Step 4: Simplify right side
    94,687.80x = 7,546,059,001.98
  5. Step 5: Solve for x
    x = 7,546,059,001.98/94,687.80
  6. Step 6: Final answer
    x = 79,694.10

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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.