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Finding the Fourth Proportional to 66,486.90, 99,708.84 and 22,101.78

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Solution

The fourth proportional to 66,486.90, 99,708.84 and 22,101.78 is: 33,145.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,486.90 : 99,708.84 = 22,101.78 : x
  2. Step 2: Convert to fraction form
    66,486.90/99,708.84 = 22,101.78/x
  3. Step 3: Cross multiply
    66,486.90x = 99,708.84 × 22,101.78
  4. Step 4: Simplify right side
    66,486.90x = 2,203,742,845.74
  5. Step 5: Solve for x
    x = 2,203,742,845.74/66,486.90
  6. Step 6: Final answer
    x = 33,145.52

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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.