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Finding the Fourth Proportional to 312,728.81, 469,122.44 and 88,088.89

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Solution

The fourth proportional to 312,728.81, 469,122.44 and 88,088.89 is: 132,141.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,728.81 : 469,122.44 = 88,088.89 : x
  2. Step 2: Convert to fraction form
    312,728.81/469,122.44 = 88,088.89/x
  3. Step 3: Cross multiply
    312,728.81x = 469,122.44 × 88,088.89
  4. Step 4: Simplify right side
    312,728.81x = 41,324,472,630.79
  5. Step 5: Solve for x
    x = 41,324,472,630.79/312,728.81
  6. Step 6: Final answer
    x = 132,141.56

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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.