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Finding the Fourth Proportional to 217,152.86, 325,720.78 and 90,760.46

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Solution

The fourth proportional to 217,152.86, 325,720.78 and 90,760.46 is: 136,137.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,152.86 : 325,720.78 = 90,760.46 : x
  2. Step 2: Convert to fraction form
    217,152.86/325,720.78 = 90,760.46/x
  3. Step 3: Cross multiply
    217,152.86x = 325,720.78 × 90,760.46
  4. Step 4: Simplify right side
    217,152.86x = 29,562,565,968.85
  5. Step 5: Solve for x
    x = 29,562,565,968.85/217,152.86
  6. Step 6: Final answer
    x = 136,137.13

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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.