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Finding the Fourth Proportional to 130,881.60, 196,350.30 and 74,748.60

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Solution

The fourth proportional to 130,881.60, 196,350.30 and 74,748.60 is: 112,138.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,881.60 : 196,350.30 = 74,748.60 : x
  2. Step 2: Convert to fraction form
    130,881.60/196,350.30 = 74,748.60/x
  3. Step 3: Cross multiply
    130,881.60x = 196,350.30 × 74,748.60
  4. Step 4: Simplify right side
    130,881.60x = 14,676,910,034.58
  5. Step 5: Solve for x
    x = 14,676,910,034.58/130,881.60
  6. Step 6: Final answer
    x = 112,138.83

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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.