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Finding the Fourth Proportional to 122,625.92, 169,270.01 and 71,655.21

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Solution

The fourth proportional to 122,625.92, 169,270.01 and 71,655.21 is: 98,911.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,625.92 : 169,270.01 = 71,655.21 : x
  2. Step 2: Convert to fraction form
    122,625.92/169,270.01 = 71,655.21/x
  3. Step 3: Cross multiply
    122,625.92x = 169,270.01 × 71,655.21
  4. Step 4: Simplify right side
    122,625.92x = 12,129,077,754.98
  5. Step 5: Solve for x
    x = 12,129,077,754.98/122,625.92
  6. Step 6: Final answer
    x = 98,911.21

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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.