Home / 87,987.52-121,423.68-47,701.36

Finding the Fourth Proportional to 87,987.52, 121,423.68 and 47,701.36

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Solution

The fourth proportional to 87,987.52, 121,423.68 and 47,701.36 is: 65,828.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,987.52 : 121,423.68 = 47,701.36 : x
  2. Step 2: Convert to fraction form
    87,987.52/121,423.68 = 47,701.36/x
  3. Step 3: Cross multiply
    87,987.52x = 121,423.68 × 47,701.36
  4. Step 4: Simplify right side
    87,987.52x = 5,792,074,672.20
  5. Step 5: Solve for x
    x = 5,792,074,672.20/87,987.52
  6. Step 6: Final answer
    x = 65,828.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.