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Finding the Fourth Proportional to 129,781.80, 194,499.90 and 92,802.60

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Solution

The fourth proportional to 129,781.80, 194,499.90 and 92,802.60 is: 139,080.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,781.80 : 194,499.90 = 92,802.60 : x
  2. Step 2: Convert to fraction form
    129,781.80/194,499.90 = 92,802.60/x
  3. Step 3: Cross multiply
    129,781.80x = 194,499.90 × 92,802.60
  4. Step 4: Simplify right side
    129,781.80x = 18,050,096,419.74
  5. Step 5: Solve for x
    x = 18,050,096,419.74/129,781.80
  6. Step 6: Final answer
    x = 139,080.34

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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.