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Finding the Fourth Proportional to 154,772, 213,585.36 and 91,149.20

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Solution

The fourth proportional to 154,772, 213,585.36 and 91,149.20 is: 125,785.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,772 : 213,585.36 = 91,149.20 : x
  2. Step 2: Convert to fraction form
    154,772/213,585.36 = 91,149.20/x
  3. Step 3: Cross multiply
    154,772x = 213,585.36 × 91,149.20
  4. Step 4: Simplify right side
    154,772x = 19,468,134,695.71
  5. Step 5: Solve for x
    x = 19,468,134,695.71/154,772
  6. Step 6: Final answer
    x = 125,785.90

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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.