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Finding the Fourth Proportional to 247,915.20, 372,261.60 and 142,939.20

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Solution

The fourth proportional to 247,915.20, 372,261.60 and 142,939.20 is: 214,632.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,915.20 : 372,261.60 = 142,939.20 : x
  2. Step 2: Convert to fraction form
    247,915.20/372,261.60 = 142,939.20/x
  3. Step 3: Cross multiply
    247,915.20x = 372,261.60 × 142,939.20
  4. Step 4: Simplify right side
    247,915.20x = 53,210,775,294.72
  5. Step 5: Solve for x
    x = 53,210,775,294.72/247,915.20
  6. Step 6: Final answer
    x = 214,632.97

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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.