Home / 81,808.46-122,688.96-31,877.42

Finding the Fourth Proportional to 81,808.46, 122,688.96 and 31,877.42

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Solution

The fourth proportional to 81,808.46, 122,688.96 and 31,877.42 is: 47,806.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,808.46 : 122,688.96 = 31,877.42 : x
  2. Step 2: Convert to fraction form
    81,808.46/122,688.96 = 31,877.42/x
  3. Step 3: Cross multiply
    81,808.46x = 122,688.96 × 31,877.42
  4. Step 4: Simplify right side
    81,808.46x = 3,911,007,507.28
  5. Step 5: Solve for x
    x = 3,911,007,507.28/81,808.46
  6. Step 6: Final answer
    x = 47,806.88

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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.