Home / 81,288.83-121,968.21-31,404.04

Finding the Fourth Proportional to 81,288.83, 121,968.21 and 31,404.04

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Solution

The fourth proportional to 81,288.83, 121,968.21 and 31,404.04 is: 47,119.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,288.83 : 121,968.21 = 31,404.04 : x
  2. Step 2: Convert to fraction form
    81,288.83/121,968.21 = 31,404.04/x
  3. Step 3: Cross multiply
    81,288.83x = 121,968.21 × 31,404.04
  4. Step 4: Simplify right side
    81,288.83x = 3,830,294,545.57
  5. Step 5: Solve for x
    x = 3,830,294,545.57/81,288.83
  6. Step 6: Final answer
    x = 47,119.57

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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.