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Finding the Fourth Proportional to 122,643.01, 169,241.82 and 71,660.44

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Solution

The fourth proportional to 122,643.01, 169,241.82 and 71,660.44 is: 98,888.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,643.01 : 169,241.82 = 71,660.44 : x
  2. Step 2: Convert to fraction form
    122,643.01/169,241.82 = 71,660.44/x
  3. Step 3: Cross multiply
    122,643.01x = 169,241.82 × 71,660.44
  4. Step 4: Simplify right side
    122,643.01x = 12,127,943,287.60
  5. Step 5: Solve for x
    x = 12,127,943,287.60/122,643.01
  6. Step 6: Final answer
    x = 98,888.17

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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.