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Finding the Fourth Proportional to 79,278.70, 109,402.50 and 47,013.16

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Solution

The fourth proportional to 79,278.70, 109,402.50 and 47,013.16 is: 64,876.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,278.70 : 109,402.50 = 47,013.16 : x
  2. Step 2: Convert to fraction form
    79,278.70/109,402.50 = 47,013.16/x
  3. Step 3: Cross multiply
    79,278.70x = 109,402.50 × 47,013.16
  4. Step 4: Simplify right side
    79,278.70x = 5,143,357,236.90
  5. Step 5: Solve for x
    x = 5,143,357,236.90/79,278.70
  6. Step 6: Final answer
    x = 64,876.91

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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.