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Finding the Fourth Proportional to 67,135.40, 100,703.10 and 40,891.40

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Solution

The fourth proportional to 67,135.40, 100,703.10 and 40,891.40 is: 61,337.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,135.40 : 100,703.10 = 40,891.40 : x
  2. Step 2: Convert to fraction form
    67,135.40/100,703.10 = 40,891.40/x
  3. Step 3: Cross multiply
    67,135.40x = 100,703.10 × 40,891.40
  4. Step 4: Simplify right side
    67,135.40x = 4,117,890,743.34
  5. Step 5: Solve for x
    x = 4,117,890,743.34/67,135.40
  6. Step 6: Final answer
    x = 61,337.10

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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.