Home / 81,002.70-121,504.05-64,272.15

Finding the Fourth Proportional to 81,002.70, 121,504.05 and 64,272.15

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Solution

The fourth proportional to 81,002.70, 121,504.05 and 64,272.15 is: 96,408.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,002.70 : 121,504.05 = 64,272.15 : x
  2. Step 2: Convert to fraction form
    81,002.70/121,504.05 = 64,272.15/x
  3. Step 3: Cross multiply
    81,002.70x = 121,504.05 × 64,272.15
  4. Step 4: Simplify right side
    81,002.70x = 7,809,326,527.21
  5. Step 5: Solve for x
    x = 7,809,326,527.21/81,002.70
  6. Step 6: Final answer
    x = 96,408.23

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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.