Home / 81,002.70-121,446.40-31,040.55

Finding the Fourth Proportional to 81,002.70, 121,446.40 and 31,040.55

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Solution

The fourth proportional to 81,002.70, 121,446.40 and 31,040.55 is: 46,538.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,002.70 : 121,446.40 = 31,040.55 : x
  2. Step 2: Convert to fraction form
    81,002.70/121,446.40 = 31,040.55/x
  3. Step 3: Cross multiply
    81,002.70x = 121,446.40 × 31,040.55
  4. Step 4: Simplify right side
    81,002.70x = 3,769,763,051.52
  5. Step 5: Solve for x
    x = 3,769,763,051.52/81,002.70
  6. Step 6: Final answer
    x = 46,538.73

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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.