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Finding the Fourth Proportional to 212,445.32, 318,209.24 and 99,956.96

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Solution

The fourth proportional to 212,445.32, 318,209.24 and 99,956.96 is: 149,719.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,445.32 : 318,209.24 = 99,956.96 : x
  2. Step 2: Convert to fraction form
    212,445.32/318,209.24 = 99,956.96/x
  3. Step 3: Cross multiply
    212,445.32x = 318,209.24 × 99,956.96
  4. Step 4: Simplify right side
    212,445.32x = 31,807,228,274.31
  5. Step 5: Solve for x
    x = 31,807,228,274.31/212,445.32
  6. Step 6: Final answer
    x = 149,719.60

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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.