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Finding the Fourth Proportional to 60,590.20, 90,926.81 and 21,147.31

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Solution

The fourth proportional to 60,590.20, 90,926.81 and 21,147.31 is: 31,735.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,590.20 : 90,926.81 = 21,147.31 : x
  2. Step 2: Convert to fraction form
    60,590.20/90,926.81 = 21,147.31/x
  3. Step 3: Cross multiply
    60,590.20x = 90,926.81 × 21,147.31
  4. Step 4: Simplify right side
    60,590.20x = 1,922,857,438.38
  5. Step 5: Solve for x
    x = 1,922,857,438.38/60,590.20
  6. Step 6: Final answer
    x = 31,735.46

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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.