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Finding the Fourth Proportional to 165,087.40, 247,631.10 and 125,721.40

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Solution

The fourth proportional to 165,087.40, 247,631.10 and 125,721.40 is: 188,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,087.40 : 247,631.10 = 125,721.40 : x
  2. Step 2: Convert to fraction form
    165,087.40/247,631.10 = 125,721.40/x
  3. Step 3: Cross multiply
    165,087.40x = 247,631.10 × 125,721.40
  4. Step 4: Simplify right side
    165,087.40x = 31,132,528,575.54
  5. Step 5: Solve for x
    x = 31,132,528,575.54/165,087.40
  6. Step 6: Final answer
    x = 188,582.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.