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Finding the Fourth Proportional to 158,362.70, 218,528.70 and 90,377.78

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Solution

The fourth proportional to 158,362.70, 218,528.70 and 90,377.78 is: 124,714.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,362.70 : 218,528.70 = 90,377.78 : x
  2. Step 2: Convert to fraction form
    158,362.70/218,528.70 = 90,377.78/x
  3. Step 3: Cross multiply
    158,362.70x = 218,528.70 × 90,377.78
  4. Step 4: Simplify right side
    158,362.70x = 19,750,138,772.29
  5. Step 5: Solve for x
    x = 19,750,138,772.29/158,362.70
  6. Step 6: Final answer
    x = 124,714.59

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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.