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Finding the Fourth Proportional to 79,864.62, 119,799.98 and 20,700.47

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Solution

The fourth proportional to 79,864.62, 119,799.98 and 20,700.47 is: 31,051.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,864.62 : 119,799.98 = 20,700.47 : x
  2. Step 2: Convert to fraction form
    79,864.62/119,799.98 = 20,700.47/x
  3. Step 3: Cross multiply
    79,864.62x = 119,799.98 × 20,700.47
  4. Step 4: Simplify right side
    79,864.62x = 2,479,915,189.49
  5. Step 5: Solve for x
    x = 2,479,915,189.49/79,864.62
  6. Step 6: Final answer
    x = 31,051.49

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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.