Home / 109,988.11-151,705.18-100,942.63

Finding the Fourth Proportional to 109,988.11, 151,705.18 and 100,942.63

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Solution

The fourth proportional to 109,988.11, 151,705.18 and 100,942.63 is: 139,228.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,988.11 : 151,705.18 = 100,942.63 : x
  2. Step 2: Convert to fraction form
    109,988.11/151,705.18 = 100,942.63/x
  3. Step 3: Cross multiply
    109,988.11x = 151,705.18 × 100,942.63
  4. Step 4: Simplify right side
    109,988.11x = 15,313,519,853.82
  5. Step 5: Solve for x
    x = 15,313,519,853.82/109,988.11
  6. Step 6: Final answer
    x = 139,228.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.