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Finding the Fourth Proportional to 212,016.71, 318,023.45 and 54,244.91

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Solution

The fourth proportional to 212,016.71, 318,023.45 and 54,244.91 is: 81,366.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,016.71 : 318,023.45 = 54,244.91 : x
  2. Step 2: Convert to fraction form
    212,016.71/318,023.45 = 54,244.91/x
  3. Step 3: Cross multiply
    212,016.71x = 318,023.45 × 54,244.91
  4. Step 4: Simplify right side
    212,016.71x = 17,251,153,151.92
  5. Step 5: Solve for x
    x = 17,251,153,151.92/212,016.71
  6. Step 6: Final answer
    x = 81,366.95

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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.