Home / 91,291.52-136,970.09-80,334.65

Finding the Fourth Proportional to 91,291.52, 136,970.09 and 80,334.65

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Solution

The fourth proportional to 91,291.52, 136,970.09 and 80,334.65 is: 120,530.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,291.52 : 136,970.09 = 80,334.65 : x
  2. Step 2: Convert to fraction form
    91,291.52/136,970.09 = 80,334.65/x
  3. Step 3: Cross multiply
    91,291.52x = 136,970.09 × 80,334.65
  4. Step 4: Simplify right side
    91,291.52x = 11,003,443,154.09
  5. Step 5: Solve for x
    x = 11,003,443,154.09/91,291.52
  6. Step 6: Final answer
    x = 120,530.84

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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.