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Finding the Fourth Proportional to 67,138.40, 100,707.60 and 40,894.40

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Solution

The fourth proportional to 67,138.40, 100,707.60 and 40,894.40 is: 61,341.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,138.40 : 100,707.60 = 40,894.40 : x
  2. Step 2: Convert to fraction form
    67,138.40/100,707.60 = 40,894.40/x
  3. Step 3: Cross multiply
    67,138.40x = 100,707.60 × 40,894.40
  4. Step 4: Simplify right side
    67,138.40x = 4,118,376,877.44
  5. Step 5: Solve for x
    x = 4,118,376,877.44/67,138.40
  6. Step 6: Final answer
    x = 61,341.60

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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.