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Finding the Fourth Proportional to 170,700.40, 256,050.60 and 81,908.20

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Solution

The fourth proportional to 170,700.40, 256,050.60 and 81,908.20 is: 122,862.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,700.40 : 256,050.60 = 81,908.20 : x
  2. Step 2: Convert to fraction form
    170,700.40/256,050.60 = 81,908.20/x
  3. Step 3: Cross multiply
    170,700.40x = 256,050.60 × 81,908.20
  4. Step 4: Simplify right side
    170,700.40x = 20,972,643,754.92
  5. Step 5: Solve for x
    x = 20,972,643,754.92/170,700.40
  6. Step 6: Final answer
    x = 122,862.30

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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.