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Finding the Fourth Proportional to 129,243.20, 193,864.80 and 128,014.40

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Solution

The fourth proportional to 129,243.20, 193,864.80 and 128,014.40 is: 192,021.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,243.20 : 193,864.80 = 128,014.40 : x
  2. Step 2: Convert to fraction form
    129,243.20/193,864.80 = 128,014.40/x
  3. Step 3: Cross multiply
    129,243.20x = 193,864.80 × 128,014.40
  4. Step 4: Simplify right side
    129,243.20x = 24,817,486,053.12
  5. Step 5: Solve for x
    x = 24,817,486,053.12/129,243.20
  6. Step 6: Final answer
    x = 192,021.60

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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.