Home / 71,511.31-98,685.29-39,680.13

Finding the Fourth Proportional to 71,511.31, 98,685.29 and 39,680.13

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Solution

The fourth proportional to 71,511.31, 98,685.29 and 39,680.13 is: 54,758.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,511.31 : 98,685.29 = 39,680.13 : x
  2. Step 2: Convert to fraction form
    71,511.31/98,685.29 = 39,680.13/x
  3. Step 3: Cross multiply
    71,511.31x = 98,685.29 × 39,680.13
  4. Step 4: Simplify right side
    71,511.31x = 3,915,844,937.89
  5. Step 5: Solve for x
    x = 3,915,844,937.89/71,511.31
  6. Step 6: Final answer
    x = 54,758.40

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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.