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Finding the Fourth Proportional to 71,187.61, 98,240.95 and 39,358.56

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Solution

The fourth proportional to 71,187.61, 98,240.95 and 39,358.56 is: 54,315.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,187.61 : 98,240.95 = 39,358.56 : x
  2. Step 2: Convert to fraction form
    71,187.61/98,240.95 = 39,358.56/x
  3. Step 3: Cross multiply
    71,187.61x = 98,240.95 × 39,358.56
  4. Step 4: Simplify right side
    71,187.61x = 3,866,622,190.03
  5. Step 5: Solve for x
    x = 3,866,622,190.03/71,187.61
  6. Step 6: Final answer
    x = 54,315.94

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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.