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Finding the Fourth Proportional to 134,679.98, 185,880.32 and 81,019.24

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Solution

The fourth proportional to 134,679.98, 185,880.32 and 81,019.24 is: 111,819.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,679.98 : 185,880.32 = 81,019.24 : x
  2. Step 2: Convert to fraction form
    134,679.98/185,880.32 = 81,019.24/x
  3. Step 3: Cross multiply
    134,679.98x = 185,880.32 × 81,019.24
  4. Step 4: Simplify right side
    134,679.98x = 15,059,881,691.38
  5. Step 5: Solve for x
    x = 15,059,881,691.38/134,679.98
  6. Step 6: Final answer
    x = 111,819.75

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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.