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Finding the Fourth Proportional to 158,491.10, 218,740.12 and 98,081.20

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Solution

The fourth proportional to 158,491.10, 218,740.12 and 98,081.20 is: 135,365.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,491.10 : 218,740.12 = 98,081.20 : x
  2. Step 2: Convert to fraction form
    158,491.10/218,740.12 = 98,081.20/x
  3. Step 3: Cross multiply
    158,491.10x = 218,740.12 × 98,081.20
  4. Step 4: Simplify right side
    158,491.10x = 21,454,292,665.69
  5. Step 5: Solve for x
    x = 21,454,292,665.69/158,491.10
  6. Step 6: Final answer
    x = 135,365.92

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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.