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Finding the Fourth Proportional to 202,788.90, 279,840.60 and 112,138.92

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Solution

The fourth proportional to 202,788.90, 279,840.60 and 112,138.92 is: 154,747.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,788.90 : 279,840.60 = 112,138.92 : x
  2. Step 2: Convert to fraction form
    202,788.90/279,840.60 = 112,138.92/x
  3. Step 3: Cross multiply
    202,788.90x = 279,840.60 × 112,138.92
  4. Step 4: Simplify right side
    202,788.90x = 31,381,022,656.15
  5. Step 5: Solve for x
    x = 31,381,022,656.15/202,788.90
  6. Step 6: Final answer
    x = 154,747.24

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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.