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Finding the Fourth Proportional to 100,367.11, 138,506.61 and 55,655.11

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Solution

The fourth proportional to 100,367.11, 138,506.61 and 55,655.11 is: 76,804.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,367.11 : 138,506.61 = 55,655.11 : x
  2. Step 2: Convert to fraction form
    100,367.11/138,506.61 = 55,655.11/x
  3. Step 3: Cross multiply
    100,367.11x = 138,506.61 × 55,655.11
  4. Step 4: Simplify right side
    100,367.11x = 7,708,600,788.41
  5. Step 5: Solve for x
    x = 7,708,600,788.41/100,367.11
  6. Step 6: Final answer
    x = 76,804.05

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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.