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Finding the Fourth Proportional to 71,072.70, 98,079.68 and 39,240.90

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Solution

The fourth proportional to 71,072.70, 98,079.68 and 39,240.90 is: 54,152.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,072.70 : 98,079.68 = 39,240.90 : x
  2. Step 2: Convert to fraction form
    71,072.70/98,079.68 = 39,240.90/x
  3. Step 3: Cross multiply
    71,072.70x = 98,079.68 × 39,240.90
  4. Step 4: Simplify right side
    71,072.70x = 3,848,734,718.71
  5. Step 5: Solve for x
    x = 3,848,734,718.71/71,072.70
  6. Step 6: Final answer
    x = 54,152.08

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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.