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Finding the Fourth Proportional to 124,409.84, 171,685.32 and 67,821.20

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Solution

The fourth proportional to 124,409.84, 171,685.32 and 67,821.20 is: 93,593.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,409.84 : 171,685.32 = 67,821.20 : x
  2. Step 2: Convert to fraction form
    124,409.84/171,685.32 = 67,821.20/x
  3. Step 3: Cross multiply
    124,409.84x = 171,685.32 × 67,821.20
  4. Step 4: Simplify right side
    124,409.84x = 11,643,904,424.78
  5. Step 5: Solve for x
    x = 11,643,904,424.78/124,409.84
  6. Step 6: Final answer
    x = 93,593.11

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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.