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Finding the Fourth Proportional to 84,459.16, 126,732.48 and 61,276.96

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Solution

The fourth proportional to 84,459.16, 126,732.48 and 61,276.96 is: 91,947.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,459.16 : 126,732.48 = 61,276.96 : x
  2. Step 2: Convert to fraction form
    84,459.16/126,732.48 = 61,276.96/x
  3. Step 3: Cross multiply
    84,459.16x = 126,732.48 × 61,276.96
  4. Step 4: Simplify right side
    84,459.16x = 7,765,781,107.66
  5. Step 5: Solve for x
    x = 7,765,781,107.66/84,459.16
  6. Step 6: Final answer
    x = 91,947.17

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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.