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Finding the Fourth Proportional to 71,513.46, 98,684.19 and 39,680.46

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Solution

The fourth proportional to 71,513.46, 98,684.19 and 39,680.46 is: 54,756.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,513.46 : 98,684.19 = 39,680.46 : x
  2. Step 2: Convert to fraction form
    71,513.46/98,684.19 = 39,680.46/x
  3. Step 3: Cross multiply
    71,513.46x = 98,684.19 × 39,680.46
  4. Step 4: Simplify right side
    71,513.46x = 3,915,834,053.93
  5. Step 5: Solve for x
    x = 3,915,834,053.93/71,513.46
  6. Step 6: Final answer
    x = 54,756.60

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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.