Home / 71,511.48-98,685.86-39,680.60

Finding the Fourth Proportional to 71,511.48, 98,685.86 and 39,680.60

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Solution

The fourth proportional to 71,511.48, 98,685.86 and 39,680.60 is: 54,759.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,511.48 : 98,685.86 = 39,680.60 : x
  2. Step 2: Convert to fraction form
    71,511.48/98,685.86 = 39,680.60/x
  3. Step 3: Cross multiply
    71,511.48x = 98,685.86 × 39,680.60
  4. Step 4: Simplify right side
    71,511.48x = 3,915,913,444.48
  5. Step 5: Solve for x
    x = 3,915,913,444.48/71,511.48
  6. Step 6: Final answer
    x = 54,759.23

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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.