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Finding the Fourth Proportional to 66,211.74, 99,261.68 and 28,743.48

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Solution

The fourth proportional to 66,211.74, 99,261.68 and 28,743.48 is: 43,090.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,211.74 : 99,261.68 = 28,743.48 : x
  2. Step 2: Convert to fraction form
    66,211.74/99,261.68 = 28,743.48/x
  3. Step 3: Cross multiply
    66,211.74x = 99,261.68 × 28,743.48
  4. Step 4: Simplify right side
    66,211.74x = 2,853,125,970.13
  5. Step 5: Solve for x
    x = 2,853,125,970.13/66,211.74
  6. Step 6: Final answer
    x = 43,090.94

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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.