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Finding the Fourth Proportional to 66,788.85, 100,162.33 and 19,407.22

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Solution

The fourth proportional to 66,788.85, 100,162.33 and 19,407.22 is: 29,104.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,788.85 : 100,162.33 = 19,407.22 : x
  2. Step 2: Convert to fraction form
    66,788.85/100,162.33 = 19,407.22/x
  3. Step 3: Cross multiply
    66,788.85x = 100,162.33 × 19,407.22
  4. Step 4: Simplify right side
    66,788.85x = 1,943,872,465.03
  5. Step 5: Solve for x
    x = 1,943,872,465.03/66,788.85
  6. Step 6: Final answer
    x = 29,104.74

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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.