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Finding the Fourth Proportional to 154,116.78, 212,679.90 and 108,240.90

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Solution

The fourth proportional to 154,116.78, 212,679.90 and 108,240.90 is: 149,371.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,116.78 : 212,679.90 = 108,240.90 : x
  2. Step 2: Convert to fraction form
    154,116.78/212,679.90 = 108,240.90/x
  3. Step 3: Cross multiply
    154,116.78x = 212,679.90 × 108,240.90
  4. Step 4: Simplify right side
    154,116.78x = 23,020,663,787.91
  5. Step 5: Solve for x
    x = 23,020,663,787.91/154,116.78
  6. Step 6: Final answer
    x = 149,371.56

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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.