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Finding the Fourth Proportional to 115,417.53, 159,276.85 and 67,671.68

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Solution

The fourth proportional to 115,417.53, 159,276.85 and 67,671.68 is: 93,387.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,417.53 : 159,276.85 = 67,671.68 : x
  2. Step 2: Convert to fraction form
    115,417.53/159,276.85 = 67,671.68/x
  3. Step 3: Cross multiply
    115,417.53x = 159,276.85 × 67,671.68
  4. Step 4: Simplify right side
    115,417.53x = 10,778,531,059.04
  5. Step 5: Solve for x
    x = 10,778,531,059.04/115,417.53
  6. Step 6: Final answer
    x = 93,387.30

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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.