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Finding the Fourth Proportional to 108,978.98, 150,391.12 and 61,232.30

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Solution

The fourth proportional to 108,978.98, 150,391.12 and 61,232.30 is: 84,500.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,978.98 : 150,391.12 = 61,232.30 : x
  2. Step 2: Convert to fraction form
    108,978.98/150,391.12 = 61,232.30/x
  3. Step 3: Cross multiply
    108,978.98x = 150,391.12 × 61,232.30
  4. Step 4: Simplify right side
    108,978.98x = 9,208,794,177.18
  5. Step 5: Solve for x
    x = 9,208,794,177.18/108,978.98
  6. Step 6: Final answer
    x = 84,500.65

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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.