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Finding the Fourth Proportional to 98,128.72, 135,363.72 and 62,294.48

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Solution

The fourth proportional to 98,128.72, 135,363.72 and 62,294.48 is: 85,932.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,128.72 : 135,363.72 = 62,294.48 : x
  2. Step 2: Convert to fraction form
    98,128.72/135,363.72 = 62,294.48/x
  3. Step 3: Cross multiply
    98,128.72x = 135,363.72 × 62,294.48
  4. Step 4: Simplify right side
    98,128.72x = 8,432,412,548.27
  5. Step 5: Solve for x
    x = 8,432,412,548.27/98,128.72
  6. Step 6: Final answer
    x = 85,932.16

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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.