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Finding the Fourth Proportional to 217,337.66, 325,978.80 and 84,126.78

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Solution

The fourth proportional to 217,337.66, 325,978.80 and 84,126.78 is: 126,179.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,337.66 : 325,978.80 = 84,126.78 : x
  2. Step 2: Convert to fraction form
    217,337.66/325,978.80 = 84,126.78/x
  3. Step 3: Cross multiply
    217,337.66x = 325,978.80 × 84,126.78
  4. Step 4: Simplify right side
    217,337.66x = 27,423,546,792.26
  5. Step 5: Solve for x
    x = 27,423,546,792.26/217,337.66
  6. Step 6: Final answer
    x = 126,179.45

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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.