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Finding the Fourth Proportional to 132,695.70, 183,108.02 and 78,972.05

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Solution

The fourth proportional to 132,695.70, 183,108.02 and 78,972.05 is: 108,974.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,695.70 : 183,108.02 = 78,972.05 : x
  2. Step 2: Convert to fraction form
    132,695.70/183,108.02 = 78,972.05/x
  3. Step 3: Cross multiply
    132,695.70x = 183,108.02 × 78,972.05
  4. Step 4: Simplify right side
    132,695.70x = 14,460,414,400.44
  5. Step 5: Solve for x
    x = 14,460,414,400.44/132,695.70
  6. Step 6: Final answer
    x = 108,974.25

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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.