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Finding the Fourth Proportional to 79,775.60, 119,760.60 and 40,312.40

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Solution

The fourth proportional to 79,775.60, 119,760.60 and 40,312.40 is: 60,517.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,775.60 : 119,760.60 = 40,312.40 : x
  2. Step 2: Convert to fraction form
    79,775.60/119,760.60 = 40,312.40/x
  3. Step 3: Cross multiply
    79,775.60x = 119,760.60 × 40,312.40
  4. Step 4: Simplify right side
    79,775.60x = 4,827,837,211.44
  5. Step 5: Solve for x
    x = 4,827,837,211.44/79,775.60
  6. Step 6: Final answer
    x = 60,517.72

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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.