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Finding the Fourth Proportional to 207,912.64, 286,919.28 and 112,419.28

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Solution

The fourth proportional to 207,912.64, 286,919.28 and 112,419.28 is: 155,138.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,912.64 : 286,919.28 = 112,419.28 : x
  2. Step 2: Convert to fraction form
    207,912.64/286,919.28 = 112,419.28/x
  3. Step 3: Cross multiply
    207,912.64x = 286,919.28 × 112,419.28
  4. Step 4: Simplify right side
    207,912.64x = 32,255,258,875.72
  5. Step 5: Solve for x
    x = 32,255,258,875.72/207,912.64
  6. Step 6: Final answer
    x = 155,138.52

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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.