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Finding the Fourth Proportional to 211,227.77, 316,861.13 and 69,073.79

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Solution

The fourth proportional to 211,227.77, 316,861.13 and 69,073.79 is: 103,617.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,227.77 : 316,861.13 = 69,073.79 : x
  2. Step 2: Convert to fraction form
    211,227.77/316,861.13 = 69,073.79/x
  3. Step 3: Cross multiply
    211,227.77x = 316,861.13 × 69,073.79
  4. Step 4: Simplify right side
    211,227.77x = 21,886,797,741.16
  5. Step 5: Solve for x
    x = 21,886,797,741.16/211,227.77
  6. Step 6: Final answer
    x = 103,617.05

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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.