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Finding the Fourth Proportional to 211,266.60, 316,920.60 and 61,508.40

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Solution

The fourth proportional to 211,266.60, 316,920.60 and 61,508.40 is: 92,268.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,266.60 : 316,920.60 = 61,508.40 : x
  2. Step 2: Convert to fraction form
    211,266.60/316,920.60 = 61,508.40/x
  3. Step 3: Cross multiply
    211,266.60x = 316,920.60 × 61,508.40
  4. Step 4: Simplify right side
    211,266.60x = 19,493,279,033.04
  5. Step 5: Solve for x
    x = 19,493,279,033.04/211,266.60
  6. Step 6: Final answer
    x = 92,268.63

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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.