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Finding the Fourth Proportional to 124,403.78, 171,677.22 and 67,815.20

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Solution

The fourth proportional to 124,403.78, 171,677.22 and 67,815.20 is: 93,584.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,403.78 : 171,677.22 = 67,815.20 : x
  2. Step 2: Convert to fraction form
    124,403.78/171,677.22 = 67,815.20/x
  3. Step 3: Cross multiply
    124,403.78x = 171,677.22 × 67,815.20
  4. Step 4: Simplify right side
    124,403.78x = 11,642,325,009.74
  5. Step 5: Solve for x
    x = 11,642,325,009.74/124,403.78
  6. Step 6: Final answer
    x = 93,584.98

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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.