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Finding the Fourth Proportional to 124,405.78, 171,679.98 and 67,817.20

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Solution

The fourth proportional to 124,405.78, 171,679.98 and 67,817.20 is: 93,587.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,405.78 : 171,679.98 = 67,817.20 : x
  2. Step 2: Convert to fraction form
    124,405.78/171,679.98 = 67,817.20/x
  3. Step 3: Cross multiply
    124,405.78x = 171,679.98 × 67,817.20
  4. Step 4: Simplify right side
    124,405.78x = 11,642,855,539.66
  5. Step 5: Solve for x
    x = 11,642,855,539.66/124,405.78
  6. Step 6: Final answer
    x = 93,587.74

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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.