Home / 100,531.45-138,798.36-62,331.58

Finding the Fourth Proportional to 100,531.45, 138,798.36 and 62,331.58

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Solution

The fourth proportional to 100,531.45, 138,798.36 and 62,331.58 is: 86,057.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,531.45 : 138,798.36 = 62,331.58 : x
  2. Step 2: Convert to fraction form
    100,531.45/138,798.36 = 62,331.58/x
  3. Step 3: Cross multiply
    100,531.45x = 138,798.36 × 62,331.58
  4. Step 4: Simplify right side
    100,531.45x = 8,651,521,080.21
  5. Step 5: Solve for x
    x = 8,651,521,080.21/100,531.45
  6. Step 6: Final answer
    x = 86,057.86

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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.