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Finding the Fourth Proportional to 79,661.61, 109,920.13 and 45,663.84

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Solution

The fourth proportional to 79,661.61, 109,920.13 and 45,663.84 is: 63,008.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,661.61 : 109,920.13 = 45,663.84 : x
  2. Step 2: Convert to fraction form
    79,661.61/109,920.13 = 45,663.84/x
  3. Step 3: Cross multiply
    79,661.61x = 109,920.13 × 45,663.84
  4. Step 4: Simplify right side
    79,661.61x = 5,019,375,229.10
  5. Step 5: Solve for x
    x = 5,019,375,229.10/79,661.61
  6. Step 6: Final answer
    x = 63,008.71

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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.