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Finding the Fourth Proportional to 71,528.58, 98,640.87 and 42,843.66

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Solution

The fourth proportional to 71,528.58, 98,640.87 and 42,843.66 is: 59,083.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,528.58 : 98,640.87 = 42,843.66 : x
  2. Step 2: Convert to fraction form
    71,528.58/98,640.87 = 42,843.66/x
  3. Step 3: Cross multiply
    71,528.58x = 98,640.87 × 42,843.66
  4. Step 4: Simplify right side
    71,528.58x = 4,226,135,896.38
  5. Step 5: Solve for x
    x = 4,226,135,896.38/71,528.58
  6. Step 6: Final answer
    x = 59,083.18

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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.