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Finding the Fourth Proportional to 122,563.84, 169,111.84 and 71,553.40

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Solution

The fourth proportional to 122,563.84, 169,111.84 and 71,553.40 is: 98,728.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,563.84 : 169,111.84 = 71,553.40 : x
  2. Step 2: Convert to fraction form
    122,563.84/169,111.84 = 71,553.40/x
  3. Step 3: Cross multiply
    122,563.84x = 169,111.84 × 71,553.40
  4. Step 4: Simplify right side
    122,563.84x = 12,100,527,132.26
  5. Step 5: Solve for x
    x = 12,100,527,132.26/122,563.84
  6. Step 6: Final answer
    x = 98,728.36

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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.