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Finding the Fourth Proportional to 71,251.36, 98,319.84 and 39,415.84

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Solution

The fourth proportional to 71,251.36, 98,319.84 and 39,415.84 is: 54,389.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,251.36 : 98,319.84 = 39,415.84 : x
  2. Step 2: Convert to fraction form
    71,251.36/98,319.84 = 39,415.84/x
  3. Step 3: Cross multiply
    71,251.36x = 98,319.84 × 39,415.84
  4. Step 4: Simplify right side
    71,251.36x = 3,875,359,082.27
  5. Step 5: Solve for x
    x = 3,875,359,082.27/71,251.36
  6. Step 6: Final answer
    x = 54,389.97

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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.