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Finding the Fourth Proportional to 79,479.80, 109,691.66 and 47,666.20

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Solution

The fourth proportional to 79,479.80, 109,691.66 and 47,666.20 is: 65,785.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,479.80 : 109,691.66 = 47,666.20 : x
  2. Step 2: Convert to fraction form
    79,479.80/109,691.66 = 47,666.20/x
  3. Step 3: Cross multiply
    79,479.80x = 109,691.66 × 47,666.20
  4. Step 4: Simplify right side
    79,479.80x = 5,228,584,603.89
  5. Step 5: Solve for x
    x = 5,228,584,603.89/79,479.80
  6. Step 6: Final answer
    x = 65,785.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.