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Finding the Fourth Proportional to 71,648.88, 98,873.64 and 39,820.56

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Solution

The fourth proportional to 71,648.88, 98,873.64 and 39,820.56 is: 54,951.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,648.88 : 98,873.64 = 39,820.56 : x
  2. Step 2: Convert to fraction form
    71,648.88/98,873.64 = 39,820.56/x
  3. Step 3: Cross multiply
    71,648.88x = 98,873.64 × 39,820.56
  4. Step 4: Simplify right side
    71,648.88x = 3,937,203,714.04
  5. Step 5: Solve for x
    x = 3,937,203,714.04/71,648.88
  6. Step 6: Final answer
    x = 54,951.36

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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.