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Finding the Fourth Proportional to 122,572.64, 169,141.15 and 68,866.60

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Solution

The fourth proportional to 122,572.64, 169,141.15 and 68,866.60 is: 95,030.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,572.64 : 169,141.15 = 68,866.60 : x
  2. Step 2: Convert to fraction form
    122,572.64/169,141.15 = 68,866.60/x
  3. Step 3: Cross multiply
    122,572.64x = 169,141.15 × 68,866.60
  4. Step 4: Simplify right side
    122,572.64x = 11,648,175,576.26
  5. Step 5: Solve for x
    x = 11,648,175,576.26/122,572.64
  6. Step 6: Final answer
    x = 95,030.80

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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.