Home / 99,905.22-137,726.19-61,639.20

Finding the Fourth Proportional to 99,905.22, 137,726.19 and 61,639.20

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Solution

The fourth proportional to 99,905.22, 137,726.19 and 61,639.20 is: 84,973.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,905.22 : 137,726.19 = 61,639.20 : x
  2. Step 2: Convert to fraction form
    99,905.22/137,726.19 = 61,639.20/x
  3. Step 3: Cross multiply
    99,905.22x = 137,726.19 × 61,639.20
  4. Step 4: Simplify right side
    99,905.22x = 8,489,332,170.65
  5. Step 5: Solve for x
    x = 8,489,332,170.65/99,905.22
  6. Step 6: Final answer
    x = 84,973.86

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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.