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Finding the Fourth Proportional to 122,987.50, 169,724.54 and 68,538.17

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Solution

The fourth proportional to 122,987.50, 169,724.54 and 68,538.17 is: 94,583.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,987.50 : 169,724.54 = 68,538.17 : x
  2. Step 2: Convert to fraction form
    122,987.50/169,724.54 = 68,538.17/x
  3. Step 3: Cross multiply
    122,987.50x = 169,724.54 × 68,538.17
  4. Step 4: Simplify right side
    122,987.50x = 11,632,609,971.35
  5. Step 5: Solve for x
    x = 11,632,609,971.35/122,987.50
  6. Step 6: Final answer
    x = 94,583.68

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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.