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Finding the Fourth Proportional to 69,987.96, 105,042.60 and 36,731.52

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Solution

The fourth proportional to 69,987.96, 105,042.60 and 36,731.52 is: 55,129.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,987.96 : 105,042.60 = 36,731.52 : x
  2. Step 2: Convert to fraction form
    69,987.96/105,042.60 = 36,731.52/x
  3. Step 3: Cross multiply
    69,987.96x = 105,042.60 × 36,731.52
  4. Step 4: Simplify right side
    69,987.96x = 3,858,374,362.75
  5. Step 5: Solve for x
    x = 3,858,374,362.75/69,987.96
  6. Step 6: Final answer
    x = 55,129.12

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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.