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Finding the Fourth Proportional to 71,696.16, 98,943.21 and 39,432.12

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Solution

The fourth proportional to 71,696.16, 98,943.21 and 39,432.12 is: 54,417.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,696.16 : 98,943.21 = 39,432.12 : x
  2. Step 2: Convert to fraction form
    71,696.16/98,943.21 = 39,432.12/x
  3. Step 3: Cross multiply
    71,696.16x = 98,943.21 × 39,432.12
  4. Step 4: Simplify right side
    71,696.16x = 3,901,540,529.91
  5. Step 5: Solve for x
    x = 3,901,540,529.91/71,696.16
  6. Step 6: Final answer
    x = 54,417.71

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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.