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Finding the Fourth Proportional to 134,965.20, 202,447.80 and 90,728.40

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Solution

The fourth proportional to 134,965.20, 202,447.80 and 90,728.40 is: 136,092.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,965.20 : 202,447.80 = 90,728.40 : x
  2. Step 2: Convert to fraction form
    134,965.20/202,447.80 = 90,728.40/x
  3. Step 3: Cross multiply
    134,965.20x = 202,447.80 × 90,728.40
  4. Step 4: Simplify right side
    134,965.20x = 18,367,764,977.52
  5. Step 5: Solve for x
    x = 18,367,764,977.52/134,965.20
  6. Step 6: Final answer
    x = 136,092.60

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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.