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Finding the Fourth Proportional to 79,138.68, 109,211.07 and 45,147.10

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Solution

The fourth proportional to 79,138.68, 109,211.07 and 45,147.10 is: 62,302.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,138.68 : 109,211.07 = 45,147.10 : x
  2. Step 2: Convert to fraction form
    79,138.68/109,211.07 = 45,147.10/x
  3. Step 3: Cross multiply
    79,138.68x = 109,211.07 × 45,147.10
  4. Step 4: Simplify right side
    79,138.68x = 4,930,563,098.40
  5. Step 5: Solve for x
    x = 4,930,563,098.40/79,138.68
  6. Step 6: Final answer
    x = 62,302.82

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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.