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Finding the Fourth Proportional to 60,871.86, 91,299.29 and 20,890.22

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Solution

The fourth proportional to 60,871.86, 91,299.29 and 20,890.22 is: 31,332.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,871.86 : 91,299.29 = 20,890.22 : x
  2. Step 2: Convert to fraction form
    60,871.86/91,299.29 = 20,890.22/x
  3. Step 3: Cross multiply
    60,871.86x = 91,299.29 × 20,890.22
  4. Step 4: Simplify right side
    60,871.86x = 1,907,261,693.00
  5. Step 5: Solve for x
    x = 1,907,261,693.00/60,871.86
  6. Step 6: Final answer
    x = 31,332.40

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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.