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Finding the Fourth Proportional to 100,626.93, 138,868.49 and 55,306.53

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Solution

The fourth proportional to 100,626.93, 138,868.49 and 55,306.53 is: 76,324.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,626.93 : 138,868.49 = 55,306.53 : x
  2. Step 2: Convert to fraction form
    100,626.93/138,868.49 = 55,306.53/x
  3. Step 3: Cross multiply
    100,626.93x = 138,868.49 × 55,306.53
  4. Step 4: Simplify right side
    100,626.93x = 7,680,334,446.51
  5. Step 5: Solve for x
    x = 7,680,334,446.51/100,626.93
  6. Step 6: Final answer
    x = 76,324.84

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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.