Home / 119,989.32-179,838.15-90,311.76

Finding the Fourth Proportional to 119,989.32, 179,838.15 and 90,311.76

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Solution

The fourth proportional to 119,989.32, 179,838.15 and 90,311.76 is: 135,357.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,989.32 : 179,838.15 = 90,311.76 : x
  2. Step 2: Convert to fraction form
    119,989.32/179,838.15 = 90,311.76/x
  3. Step 3: Cross multiply
    119,989.32x = 179,838.15 × 90,311.76
  4. Step 4: Simplify right side
    119,989.32x = 16,241,499,841.64
  5. Step 5: Solve for x
    x = 16,241,499,841.64/119,989.32
  6. Step 6: Final answer
    x = 135,357.88

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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.