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Finding the Fourth Proportional to 60,790.89, 91,188.95 and 18,672.65

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Solution

The fourth proportional to 60,790.89, 91,188.95 and 18,672.65 is: 28,009.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,790.89 : 91,188.95 = 18,672.65 : x
  2. Step 2: Convert to fraction form
    60,790.89/91,188.95 = 18,672.65/x
  3. Step 3: Cross multiply
    60,790.89x = 91,188.95 × 18,672.65
  4. Step 4: Simplify right side
    60,790.89x = 1,702,739,347.22
  5. Step 5: Solve for x
    x = 1,702,739,347.22/60,790.89
  6. Step 6: Final answer
    x = 28,009.78

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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.