Home / 128,387.42-192,581.70-84,293.18

Finding the Fourth Proportional to 128,387.42, 192,581.70 and 84,293.18

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Solution

The fourth proportional to 128,387.42, 192,581.70 and 84,293.18 is: 126,440.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,387.42 : 192,581.70 = 84,293.18 : x
  2. Step 2: Convert to fraction form
    128,387.42/192,581.70 = 84,293.18/x
  3. Step 3: Cross multiply
    128,387.42x = 192,581.70 × 84,293.18
  4. Step 4: Simplify right side
    128,387.42x = 16,233,323,902.81
  5. Step 5: Solve for x
    x = 16,233,323,902.81/128,387.42
  6. Step 6: Final answer
    x = 126,440.14

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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.