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Finding the Fourth Proportional to 60,611.34, 90,922.89 and 20,658.50

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Solution

The fourth proportional to 60,611.34, 90,922.89 and 20,658.50 is: 30,989.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,611.34 : 90,922.89 = 20,658.50 : x
  2. Step 2: Convert to fraction form
    60,611.34/90,922.89 = 20,658.50/x
  3. Step 3: Cross multiply
    60,611.34x = 90,922.89 × 20,658.50
  4. Step 4: Simplify right side
    60,611.34x = 1,878,330,523.07
  5. Step 5: Solve for x
    x = 1,878,330,523.07/60,611.34
  6. Step 6: Final answer
    x = 30,989.75

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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.