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Finding the Fourth Proportional to 216,853.79, 325,105.38 and 90,590.76

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Solution

The fourth proportional to 216,853.79, 325,105.38 and 90,590.76 is: 135,812.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,853.79 : 325,105.38 = 90,590.76 : x
  2. Step 2: Convert to fraction form
    216,853.79/325,105.38 = 90,590.76/x
  3. Step 3: Cross multiply
    216,853.79x = 325,105.38 × 90,590.76
  4. Step 4: Simplify right side
    216,853.79x = 29,451,543,454.29
  5. Step 5: Solve for x
    x = 29,451,543,454.29/216,853.79
  6. Step 6: Final answer
    x = 135,812.91

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1.5x scale

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.