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Finding the Fourth Proportional to 67,880.60, 101,820.90 and 66,422.60

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Solution

The fourth proportional to 67,880.60, 101,820.90 and 66,422.60 is: 99,633.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,880.60 : 101,820.90 = 66,422.60 : x
  2. Step 2: Convert to fraction form
    67,880.60/101,820.90 = 66,422.60/x
  3. Step 3: Cross multiply
    67,880.60x = 101,820.90 × 66,422.60
  4. Step 4: Simplify right side
    67,880.60x = 6,763,208,912.34
  5. Step 5: Solve for x
    x = 6,763,208,912.34/67,880.60
  6. Step 6: Final answer
    x = 99,633.90

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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.