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Finding the Fourth Proportional to 71,617.40, 98,832.12 and 39,785.48

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Solution

The fourth proportional to 71,617.40, 98,832.12 and 39,785.48 is: 54,904.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,617.40 : 98,832.12 = 39,785.48 : x
  2. Step 2: Convert to fraction form
    71,617.40/98,832.12 = 39,785.48/x
  3. Step 3: Cross multiply
    71,617.40x = 98,832.12 × 39,785.48
  4. Step 4: Simplify right side
    71,617.40x = 3,932,083,333.62
  5. Step 5: Solve for x
    x = 3,932,083,333.62/71,617.40
  6. Step 6: Final answer
    x = 54,904.02

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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.