Home / 113,517.81-156,490.94-79,420.66

Finding the Fourth Proportional to 113,517.81, 156,490.94 and 79,420.66

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Solution

The fourth proportional to 113,517.81, 156,490.94 and 79,420.66 is: 109,486.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,517.81 : 156,490.94 = 79,420.66 : x
  2. Step 2: Convert to fraction form
    113,517.81/156,490.94 = 79,420.66/x
  3. Step 3: Cross multiply
    113,517.81x = 156,490.94 × 79,420.66
  4. Step 4: Simplify right side
    113,517.81x = 12,428,613,546.14
  5. Step 5: Solve for x
    x = 12,428,613,546.14/113,517.81
  6. Step 6: Final answer
    x = 109,486.02

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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.