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Finding the Fourth Proportional to 85,510.90, 117,928.38 and 71,218.18

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Solution

The fourth proportional to 85,510.90, 117,928.38 and 71,218.18 is: 98,217.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,510.90 : 117,928.38 = 71,218.18 : x
  2. Step 2: Convert to fraction form
    85,510.90/117,928.38 = 71,218.18/x
  3. Step 3: Cross multiply
    85,510.90x = 117,928.38 × 71,218.18
  4. Step 4: Simplify right side
    85,510.90x = 8,398,644,593.95
  5. Step 5: Solve for x
    x = 8,398,644,593.95/85,510.90
  6. Step 6: Final answer
    x = 98,217.24

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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.