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Finding the Fourth Proportional to 67,078.60, 100,682.70 and 40,834.60

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Solution

The fourth proportional to 67,078.60, 100,682.70 and 40,834.60 is: 61,291.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,078.60 : 100,682.70 = 40,834.60 : x
  2. Step 2: Convert to fraction form
    67,078.60/100,682.70 = 40,834.60/x
  3. Step 3: Cross multiply
    67,078.60x = 100,682.70 × 40,834.60
  4. Step 4: Simplify right side
    67,078.60x = 4,111,337,781.42
  5. Step 5: Solve for x
    x = 4,111,337,781.42/67,078.60
  6. Step 6: Final answer
    x = 61,291.35

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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.