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Finding the Fourth Proportional to 158,910.66, 219,242.40 and 90,902.85

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Solution

The fourth proportional to 158,910.66, 219,242.40 and 90,902.85 is: 125,414.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,910.66 : 219,242.40 = 90,902.85 : x
  2. Step 2: Convert to fraction form
    158,910.66/219,242.40 = 90,902.85/x
  3. Step 3: Cross multiply
    158,910.66x = 219,242.40 × 90,902.85
  4. Step 4: Simplify right side
    158,910.66x = 19,929,759,000.84
  5. Step 5: Solve for x
    x = 19,929,759,000.84/158,910.66
  6. Step 6: Final answer
    x = 125,414.87

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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.