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Finding the Fourth Proportional to 87,030, 130,342.55 and 84,635.55

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Solution

The fourth proportional to 87,030, 130,342.55 and 84,635.55 is: 126,756.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,030 : 130,342.55 = 84,635.55 : x
  2. Step 2: Convert to fraction form
    87,030/130,342.55 = 84,635.55/x
  3. Step 3: Cross multiply
    87,030x = 130,342.55 × 84,635.55
  4. Step 4: Simplify right side
    87,030x = 11,031,612,984.47
  5. Step 5: Solve for x
    x = 11,031,612,984.47/87,030
  6. Step 6: Final answer
    x = 126,756.44

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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.