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Finding the Fourth Proportional to 108,726.64, 150,040.92 and 60,978.96

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Solution

The fourth proportional to 108,726.64, 150,040.92 and 60,978.96 is: 84,149.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,726.64 : 150,040.92 = 60,978.96 : x
  2. Step 2: Convert to fraction form
    108,726.64/150,040.92 = 60,978.96/x
  3. Step 3: Cross multiply
    108,726.64x = 150,040.92 × 60,978.96
  4. Step 4: Simplify right side
    108,726.64x = 9,149,339,487.71
  5. Step 5: Solve for x
    x = 9,149,339,487.71/108,726.64
  6. Step 6: Final answer
    x = 84,149.94

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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.