Home / 78,719.13-118,098.68-23,315.13

Finding the Fourth Proportional to 78,719.13, 118,098.68 and 23,315.13

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Solution

The fourth proportional to 78,719.13, 118,098.68 and 23,315.13 is: 34,978.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,719.13 : 118,098.68 = 23,315.13 : x
  2. Step 2: Convert to fraction form
    78,719.13/118,098.68 = 23,315.13/x
  3. Step 3: Cross multiply
    78,719.13x = 118,098.68 × 23,315.13
  4. Step 4: Simplify right side
    78,719.13x = 2,753,486,077.03
  5. Step 5: Solve for x
    x = 2,753,486,077.03/78,719.13
  6. Step 6: Final answer
    x = 34,978.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.