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Finding the Fourth Proportional to 124,563.76, 171,901.62 and 67,978.78

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Solution

The fourth proportional to 124,563.76, 171,901.62 and 67,978.78 is: 93,812.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,563.76 : 171,901.62 = 67,978.78 : x
  2. Step 2: Convert to fraction form
    124,563.76/171,901.62 = 67,978.78/x
  3. Step 3: Cross multiply
    124,563.76x = 171,901.62 × 67,978.78
  4. Step 4: Simplify right side
    124,563.76x = 11,685,662,407.62
  5. Step 5: Solve for x
    x = 11,685,662,407.62/124,563.76
  6. Step 6: Final answer
    x = 93,812.70

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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.