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Finding the Fourth Proportional to 128,707.20, 193,060.80 and 106,934.40

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Solution

The fourth proportional to 128,707.20, 193,060.80 and 106,934.40 is: 160,401.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,707.20 : 193,060.80 = 106,934.40 : x
  2. Step 2: Convert to fraction form
    128,707.20/193,060.80 = 106,934.40/x
  3. Step 3: Cross multiply
    128,707.20x = 193,060.80 × 106,934.40
  4. Step 4: Simplify right side
    128,707.20x = 20,644,840,811.52
  5. Step 5: Solve for x
    x = 20,644,840,811.52/128,707.20
  6. Step 6: Final answer
    x = 160,401.60

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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.