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Finding the Fourth Proportional to 100,549.62, 138,759.62 and 55,228.67

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Solution

The fourth proportional to 100,549.62, 138,759.62 and 55,228.67 is: 76,216.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,549.62 : 138,759.62 = 55,228.67 : x
  2. Step 2: Convert to fraction form
    100,549.62/138,759.62 = 55,228.67/x
  3. Step 3: Cross multiply
    100,549.62x = 138,759.62 × 55,228.67
  4. Step 4: Simplify right side
    100,549.62x = 7,663,508,812.71
  5. Step 5: Solve for x
    x = 7,663,508,812.71/100,549.62
  6. Step 6: Final answer
    x = 76,216.19

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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.