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Finding the Fourth Proportional to 132,693.90, 183,132.71 and 78,979.09

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Solution

The fourth proportional to 132,693.90, 183,132.71 and 78,979.09 is: 109,000.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,693.90 : 183,132.71 = 78,979.09 : x
  2. Step 2: Convert to fraction form
    132,693.90/183,132.71 = 78,979.09/x
  3. Step 3: Cross multiply
    132,693.90x = 183,132.71 × 78,979.09
  4. Step 4: Simplify right side
    132,693.90x = 14,463,654,228.48
  5. Step 5: Solve for x
    x = 14,463,654,228.48/132,693.90
  6. Step 6: Final answer
    x = 109,000.14

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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.