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Finding the Fourth Proportional to 79,729.60, 119,691.60 and 40,266.40

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Solution

The fourth proportional to 79,729.60, 119,691.60 and 40,266.40 is: 60,448.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,729.60 : 119,691.60 = 40,266.40 : x
  2. Step 2: Convert to fraction form
    79,729.60/119,691.60 = 40,266.40/x
  3. Step 3: Cross multiply
    79,729.60x = 119,691.60 × 40,266.40
  4. Step 4: Simplify right side
    79,729.60x = 4,819,549,842.24
  5. Step 5: Solve for x
    x = 4,819,549,842.24/79,729.60
  6. Step 6: Final answer
    x = 60,448.69

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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.