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Finding the Fourth Proportional to 219,049.54, 302,230.92 and 128,356.81

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Solution

The fourth proportional to 219,049.54, 302,230.92 and 128,356.81 is: 177,098.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,049.54 : 302,230.92 = 128,356.81 : x
  2. Step 2: Convert to fraction form
    219,049.54/302,230.92 = 128,356.81/x
  3. Step 3: Cross multiply
    219,049.54x = 302,230.92 × 128,356.81
  4. Step 4: Simplify right side
    219,049.54x = 38,793,396,774.57
  5. Step 5: Solve for x
    x = 38,793,396,774.57/219,049.54
  6. Step 6: Final answer
    x = 177,098.74

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1.5x scale

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.