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Finding the Fourth Proportional to 207,912.88, 286,919.94 and 112,419.64

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Solution

The fourth proportional to 207,912.88, 286,919.94 and 112,419.64 is: 155,139.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,912.88 : 286,919.94 = 112,419.64 : x
  2. Step 2: Convert to fraction form
    207,912.88/286,919.94 = 112,419.64/x
  3. Step 3: Cross multiply
    207,912.88x = 286,919.94 × 112,419.64
  4. Step 4: Simplify right side
    207,912.88x = 32,255,436,363.62
  5. Step 5: Solve for x
    x = 32,255,436,363.62/207,912.88
  6. Step 6: Final answer
    x = 155,139.19

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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.