Home / 81,019.40-121,529.10-76,094.60

Finding the Fourth Proportional to 81,019.40, 121,529.10 and 76,094.60

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Solution

The fourth proportional to 81,019.40, 121,529.10 and 76,094.60 is: 114,141.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,019.40 : 121,529.10 = 76,094.60 : x
  2. Step 2: Convert to fraction form
    81,019.40/121,529.10 = 76,094.60/x
  3. Step 3: Cross multiply
    81,019.40x = 121,529.10 × 76,094.60
  4. Step 4: Simplify right side
    81,019.40x = 9,247,708,252.86
  5. Step 5: Solve for x
    x = 9,247,708,252.86/81,019.40
  6. Step 6: Final answer
    x = 114,141.90

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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.