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Finding the Fourth Proportional to 60,778.80, 91,168.20 and 21,339.90

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Solution

The fourth proportional to 60,778.80, 91,168.20 and 21,339.90 is: 32,009.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,778.80 : 91,168.20 = 21,339.90 : x
  2. Step 2: Convert to fraction form
    60,778.80/91,168.20 = 21,339.90/x
  3. Step 3: Cross multiply
    60,778.80x = 91,168.20 × 21,339.90
  4. Step 4: Simplify right side
    60,778.80x = 1,945,520,271.18
  5. Step 5: Solve for x
    x = 1,945,520,271.18/60,778.80
  6. Step 6: Final answer
    x = 32,009.85

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1.5x scale

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.