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Finding the Fourth Proportional to 178,821.20, 268,231.80 and 90,040.40

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Solution

The fourth proportional to 178,821.20, 268,231.80 and 90,040.40 is: 135,060.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,821.20 : 268,231.80 = 90,040.40 : x
  2. Step 2: Convert to fraction form
    178,821.20/268,231.80 = 90,040.40/x
  3. Step 3: Cross multiply
    178,821.20x = 268,231.80 × 90,040.40
  4. Step 4: Simplify right side
    178,821.20x = 24,151,698,564.72
  5. Step 5: Solve for x
    x = 24,151,698,564.72/178,821.20
  6. Step 6: Final answer
    x = 135,060.60

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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.