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Finding the Fourth Proportional to 61,342.80, 91,992.60 and 21,901.20

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Solution

The fourth proportional to 61,342.80, 91,992.60 and 21,901.20 is: 32,844.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,342.80 : 91,992.60 = 21,901.20 : x
  2. Step 2: Convert to fraction form
    61,342.80/91,992.60 = 21,901.20/x
  3. Step 3: Cross multiply
    61,342.80x = 91,992.60 × 21,901.20
  4. Step 4: Simplify right side
    61,342.80x = 2,014,748,331.12
  5. Step 5: Solve for x
    x = 2,014,748,331.12/61,342.80
  6. Step 6: Final answer
    x = 32,844.09

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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.