Home / 154,864.45-213,729.15-86,899.78

Finding the Fourth Proportional to 154,864.45, 213,729.15 and 86,899.78

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Solution

The fourth proportional to 154,864.45, 213,729.15 and 86,899.78 is: 119,930.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,864.45 : 213,729.15 = 86,899.78 : x
  2. Step 2: Convert to fraction form
    154,864.45/213,729.15 = 86,899.78/x
  3. Step 3: Cross multiply
    154,864.45x = 213,729.15 × 86,899.78
  4. Step 4: Simplify right side
    154,864.45x = 18,573,016,114.59
  5. Step 5: Solve for x
    x = 18,573,016,114.59/154,864.45
  6. Step 6: Final answer
    x = 119,930.79

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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.