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Finding the Fourth Proportional to 128,262.66, 177,002.19 and 71,674.04

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Solution

The fourth proportional to 128,262.66, 177,002.19 and 71,674.04 is: 98,910.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,262.66 : 177,002.19 = 71,674.04 : x
  2. Step 2: Convert to fraction form
    128,262.66/177,002.19 = 71,674.04/x
  3. Step 3: Cross multiply
    128,262.66x = 177,002.19 × 71,674.04
  4. Step 4: Simplify right side
    128,262.66x = 12,686,462,046.15
  5. Step 5: Solve for x
    x = 12,686,462,046.15/128,262.66
  6. Step 6: Final answer
    x = 98,910.02

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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.