Home / 81,547.28-122,352.06-31,662.42

Finding the Fourth Proportional to 81,547.28, 122,352.06 and 31,662.42

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Solution

The fourth proportional to 81,547.28, 122,352.06 and 31,662.42 is: 47,505.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,547.28 : 122,352.06 = 31,662.42 : x
  2. Step 2: Convert to fraction form
    81,547.28/122,352.06 = 31,662.42/x
  3. Step 3: Cross multiply
    81,547.28x = 122,352.06 × 31,662.42
  4. Step 4: Simplify right side
    81,547.28x = 3,873,962,311.59
  5. Step 5: Solve for x
    x = 3,873,962,311.59/81,547.28
  6. Step 6: Final answer
    x = 47,505.72

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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.