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Finding the Fourth Proportional to 71,480.82, 98,641.98 and 39,649.08

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Solution

The fourth proportional to 71,480.82, 98,641.98 and 39,649.08 is: 54,714.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,480.82 : 98,641.98 = 39,649.08 : x
  2. Step 2: Convert to fraction form
    71,480.82/98,641.98 = 39,649.08/x
  3. Step 3: Cross multiply
    71,480.82x = 98,641.98 × 39,649.08
  4. Step 4: Simplify right side
    71,480.82x = 3,911,063,756.38
  5. Step 5: Solve for x
    x = 3,911,063,756.38/71,480.82
  6. Step 6: Final answer
    x = 54,714.87

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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.