Home / 128,974.88-193,287.35-72,787.21

Finding the Fourth Proportional to 128,974.88, 193,287.35 and 72,787.21

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Solution

The fourth proportional to 128,974.88, 193,287.35 and 72,787.21 is: 109,082.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,974.88 : 193,287.35 = 72,787.21 : x
  2. Step 2: Convert to fraction form
    128,974.88/193,287.35 = 72,787.21/x
  3. Step 3: Cross multiply
    128,974.88x = 193,287.35 × 72,787.21
  4. Step 4: Simplify right side
    128,974.88x = 14,068,846,934.79
  5. Step 5: Solve for x
    x = 14,068,846,934.79/128,974.88
  6. Step 6: Final answer
    x = 109,082.07

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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.