Home / 79,724.96-109,979.28-51,385.76

Finding the Fourth Proportional to 79,724.96, 109,979.28 and 51,385.76

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Solution

The fourth proportional to 79,724.96, 109,979.28 and 51,385.76 is: 70,885.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,724.96 : 109,979.28 = 51,385.76 : x
  2. Step 2: Convert to fraction form
    79,724.96/109,979.28 = 51,385.76/x
  3. Step 3: Cross multiply
    79,724.96x = 109,979.28 × 51,385.76
  4. Step 4: Simplify right side
    79,724.96x = 5,651,368,887.05
  5. Step 5: Solve for x
    x = 5,651,368,887.05/79,724.96
  6. Step 6: Final answer
    x = 70,885.82

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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.