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Finding the Fourth Proportional to 66,126.81, 99,158.95 and 25,619.31

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Solution

The fourth proportional to 66,126.81, 99,158.95 and 25,619.31 is: 38,416.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,126.81 : 99,158.95 = 25,619.31 : x
  2. Step 2: Convert to fraction form
    66,126.81/99,158.95 = 25,619.31/x
  3. Step 3: Cross multiply
    66,126.81x = 99,158.95 × 25,619.31
  4. Step 4: Simplify right side
    66,126.81x = 2,540,383,911.35
  5. Step 5: Solve for x
    x = 2,540,383,911.35/66,126.81
  6. Step 6: Final answer
    x = 38,416.85

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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.