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Finding the Fourth Proportional to 111,712.96, 154,112.46 and 98,979.04

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Solution

The fourth proportional to 111,712.96, 154,112.46 and 98,979.04 is: 136,545.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,712.96 : 154,112.46 = 98,979.04 : x
  2. Step 2: Convert to fraction form
    111,712.96/154,112.46 = 98,979.04/x
  3. Step 3: Cross multiply
    111,712.96x = 154,112.46 × 98,979.04
  4. Step 4: Simplify right side
    111,712.96x = 15,253,903,342.84
  5. Step 5: Solve for x
    x = 15,253,903,342.84/111,712.96
  6. Step 6: Final answer
    x = 136,545.51

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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.