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Finding the Fourth Proportional to 85,283.66, 127,821.72 and 60,330.90

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Solution

The fourth proportional to 85,283.66, 127,821.72 and 60,330.90 is: 90,422.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,283.66 : 127,821.72 = 60,330.90 : x
  2. Step 2: Convert to fraction form
    85,283.66/127,821.72 = 60,330.90/x
  3. Step 3: Cross multiply
    85,283.66x = 127,821.72 × 60,330.90
  4. Step 4: Simplify right side
    85,283.66x = 7,711,599,583.54
  5. Step 5: Solve for x
    x = 7,711,599,583.54/85,283.66
  6. Step 6: Final answer
    x = 90,422.94

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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.