Home / 154,209.48-212,781.30-86,227.80

Finding the Fourth Proportional to 154,209.48, 212,781.30 and 86,227.80

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Solution

The fourth proportional to 154,209.48, 212,781.30 and 86,227.80 is: 118,978.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,209.48 : 212,781.30 = 86,227.80 : x
  2. Step 2: Convert to fraction form
    154,209.48/212,781.30 = 86,227.80/x
  3. Step 3: Cross multiply
    154,209.48x = 212,781.30 × 86,227.80
  4. Step 4: Simplify right side
    154,209.48x = 18,347,663,380.14
  5. Step 5: Solve for x
    x = 18,347,663,380.14/154,209.48
  6. Step 6: Final answer
    x = 118,978.83

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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.