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Finding the Fourth Proportional to 79,612.80, 119,246.40 and 51,619.20

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Solution

The fourth proportional to 79,612.80, 119,246.40 and 51,619.20 is: 77,316.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,612.80 : 119,246.40 = 51,619.20 : x
  2. Step 2: Convert to fraction form
    79,612.80/119,246.40 = 51,619.20/x
  3. Step 3: Cross multiply
    79,612.80x = 119,246.40 × 51,619.20
  4. Step 4: Simplify right side
    79,612.80x = 6,155,403,770.88
  5. Step 5: Solve for x
    x = 6,155,403,770.88/79,612.80
  6. Step 6: Final answer
    x = 77,316.76

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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.