Home / 87,681.72-121,001.30-47,395.36

Finding the Fourth Proportional to 87,681.72, 121,001.30 and 47,395.36

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Solution

The fourth proportional to 87,681.72, 121,001.30 and 47,395.36 is: 65,405.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,681.72 : 121,001.30 = 47,395.36 : x
  2. Step 2: Convert to fraction form
    87,681.72/121,001.30 = 47,395.36/x
  3. Step 3: Cross multiply
    87,681.72x = 121,001.30 × 47,395.36
  4. Step 4: Simplify right side
    87,681.72x = 5,734,900,173.97
  5. Step 5: Solve for x
    x = 5,734,900,173.97/87,681.72
  6. Step 6: Final answer
    x = 65,405.88

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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.