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Finding the Fourth Proportional to 66,126.78, 99,100.89 and 30,987.90

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Solution

The fourth proportional to 66,126.78, 99,100.89 and 30,987.90 is: 46,440.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,126.78 : 99,100.89 = 30,987.90 : x
  2. Step 2: Convert to fraction form
    66,126.78/99,100.89 = 30,987.90/x
  3. Step 3: Cross multiply
    66,126.78x = 99,100.89 × 30,987.90
  4. Step 4: Simplify right side
    66,126.78x = 3,070,928,469.23
  5. Step 5: Solve for x
    x = 3,070,928,469.23/66,126.78
  6. Step 6: Final answer
    x = 46,440.01

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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.