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Finding the Fourth Proportional to 109,858.80, 151,614.60 and 62,120.64

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Solution

The fourth proportional to 109,858.80, 151,614.60 and 62,120.64 is: 85,731.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,858.80 : 151,614.60 = 62,120.64 : x
  2. Step 2: Convert to fraction form
    109,858.80/151,614.60 = 62,120.64/x
  3. Step 3: Cross multiply
    109,858.80x = 151,614.60 × 62,120.64
  4. Step 4: Simplify right side
    109,858.80x = 9,418,395,985.34
  5. Step 5: Solve for x
    x = 9,418,395,985.34/109,858.80
  6. Step 6: Final answer
    x = 85,731.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.