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Finding the Fourth Proportional to 79,439.48, 119,159.12 and 20,275.16

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Solution

The fourth proportional to 79,439.48, 119,159.12 and 20,275.16 is: 30,412.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,439.48 : 119,159.12 = 20,275.16 : x
  2. Step 2: Convert to fraction form
    79,439.48/119,159.12 = 20,275.16/x
  3. Step 3: Cross multiply
    79,439.48x = 119,159.12 × 20,275.16
  4. Step 4: Simplify right side
    79,439.48x = 2,415,969,678.35
  5. Step 5: Solve for x
    x = 2,415,969,678.35/79,439.48
  6. Step 6: Final answer
    x = 30,412.71

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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.