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Finding the Fourth Proportional to 79,841.28, 119,762.40 and 20,672.88

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Solution

The fourth proportional to 79,841.28, 119,762.40 and 20,672.88 is: 31,009.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,841.28 : 119,762.40 = 20,672.88 : x
  2. Step 2: Convert to fraction form
    79,841.28/119,762.40 = 20,672.88/x
  3. Step 3: Cross multiply
    79,841.28x = 119,762.40 × 20,672.88
  4. Step 4: Simplify right side
    79,841.28x = 2,475,833,723.71
  5. Step 5: Solve for x
    x = 2,475,833,723.71/79,841.28
  6. Step 6: Final answer
    x = 31,009.44

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1.5x scale

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.