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Finding the Fourth Proportional to 71,398.80, 106,995.60 and 40,168.08

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Solution

The fourth proportional to 71,398.80, 106,995.60 and 40,168.08 is: 60,194.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,398.80 : 106,995.60 = 40,168.08 : x
  2. Step 2: Convert to fraction form
    71,398.80/106,995.60 = 40,168.08/x
  3. Step 3: Cross multiply
    71,398.80x = 106,995.60 × 40,168.08
  4. Step 4: Simplify right side
    71,398.80x = 4,297,807,820.45
  5. Step 5: Solve for x
    x = 4,297,807,820.45/71,398.80
  6. Step 6: Final answer
    x = 60,194.40

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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.