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Finding the Fourth Proportional to 207,609.21, 286,500.71 and 112,115.90

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Solution

The fourth proportional to 207,609.21, 286,500.71 and 112,115.90 is: 154,719.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,609.21 : 286,500.71 = 112,115.90 : x
  2. Step 2: Convert to fraction form
    207,609.21/286,500.71 = 112,115.90/x
  3. Step 3: Cross multiply
    207,609.21x = 286,500.71 × 112,115.90
  4. Step 4: Simplify right side
    207,609.21x = 32,121,285,948.83
  5. Step 5: Solve for x
    x = 32,121,285,948.83/207,609.21
  6. Step 6: Final answer
    x = 154,719.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.