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Finding the Fourth Proportional to 85,228.80, 127,958.40 and 67,718.40

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Solution

The fourth proportional to 85,228.80, 127,958.40 and 67,718.40 is: 101,669.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,228.80 : 127,958.40 = 67,718.40 : x
  2. Step 2: Convert to fraction form
    85,228.80/127,958.40 = 67,718.40/x
  3. Step 3: Cross multiply
    85,228.80x = 127,958.40 × 67,718.40
  4. Step 4: Simplify right side
    85,228.80x = 8,665,138,114.56
  5. Step 5: Solve for x
    x = 8,665,138,114.56/85,228.80
  6. Step 6: Final answer
    x = 101,669.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.