Home / 153,728.20-212,117.70-86,660.20

Finding the Fourth Proportional to 153,728.20, 212,117.70 and 86,660.20

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Solution

The fourth proportional to 153,728.20, 212,117.70 and 86,660.20 is: 119,575.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,728.20 : 212,117.70 = 86,660.20 : x
  2. Step 2: Convert to fraction form
    153,728.20/212,117.70 = 86,660.20/x
  3. Step 3: Cross multiply
    153,728.20x = 212,117.70 × 86,660.20
  4. Step 4: Simplify right side
    153,728.20x = 18,382,162,305.54
  5. Step 5: Solve for x
    x = 18,382,162,305.54/153,728.20
  6. Step 6: Final answer
    x = 119,575.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.