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Finding the Fourth Proportional to 122,987.44, 169,726.08 and 75,239.92

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Solution

The fourth proportional to 122,987.44, 169,726.08 and 75,239.92 is: 103,833.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,987.44 : 169,726.08 = 75,239.92 : x
  2. Step 2: Convert to fraction form
    122,987.44/169,726.08 = 75,239.92/x
  3. Step 3: Cross multiply
    122,987.44x = 169,726.08 × 75,239.92
  4. Step 4: Simplify right side
    122,987.44x = 12,770,176,681.11
  5. Step 5: Solve for x
    x = 12,770,176,681.11/122,987.44
  6. Step 6: Final answer
    x = 103,833.18

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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.