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Finding the Fourth Proportional to 68,157.40, 102,236.10 and 18,909.40

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Solution

The fourth proportional to 68,157.40, 102,236.10 and 18,909.40 is: 28,364.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,157.40 : 102,236.10 = 18,909.40 : x
  2. Step 2: Convert to fraction form
    68,157.40/102,236.10 = 18,909.40/x
  3. Step 3: Cross multiply
    68,157.40x = 102,236.10 × 18,909.40
  4. Step 4: Simplify right side
    68,157.40x = 1,933,223,309.34
  5. Step 5: Solve for x
    x = 1,933,223,309.34/68,157.40
  6. Step 6: Final answer
    x = 28,364.10

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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.