Home / 218,972.30-328,231.65-118,921.10

Finding the Fourth Proportional to 218,972.30, 328,231.65 and 118,921.10

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Solution

The fourth proportional to 218,972.30, 328,231.65 and 118,921.10 is: 178,258.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,972.30 : 328,231.65 = 118,921.10 : x
  2. Step 2: Convert to fraction form
    218,972.30/328,231.65 = 118,921.10/x
  3. Step 3: Cross multiply
    218,972.30x = 328,231.65 × 118,921.10
  4. Step 4: Simplify right side
    218,972.30x = 39,033,668,872.82
  5. Step 5: Solve for x
    x = 39,033,668,872.82/218,972.30
  6. Step 6: Final answer
    x = 178,258.48

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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.