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Finding the Fourth Proportional to 124,407.78, 171,682.74 and 67,819.20

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Solution

The fourth proportional to 124,407.78, 171,682.74 and 67,819.20 is: 93,590.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,407.78 : 171,682.74 = 67,819.20 : x
  2. Step 2: Convert to fraction form
    124,407.78/171,682.74 = 67,819.20/x
  3. Step 3: Cross multiply
    124,407.78x = 171,682.74 × 67,819.20
  4. Step 4: Simplify right side
    124,407.78x = 11,643,386,080.61
  5. Step 5: Solve for x
    x = 11,643,386,080.61/124,407.78
  6. Step 6: Final answer
    x = 93,590.50

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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.