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Finding the Fourth Proportional to 61,002.95, 91,486.81 and 21,020.30

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Solution

The fourth proportional to 61,002.95, 91,486.81 and 21,020.30 is: 31,524.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,002.95 : 91,486.81 = 21,020.30 : x
  2. Step 2: Convert to fraction form
    61,002.95/91,486.81 = 21,020.30/x
  3. Step 3: Cross multiply
    61,002.95x = 91,486.81 × 21,020.30
  4. Step 4: Simplify right side
    61,002.95x = 1,923,079,682.26
  5. Step 5: Solve for x
    x = 1,923,079,682.26/61,002.95
  6. Step 6: Final answer
    x = 31,524.37

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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.