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Finding the Fourth Proportional to 67,230.20, 100,918.20 and 42,298.40

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Solution

The fourth proportional to 67,230.20, 100,918.20 and 42,298.40 is: 63,493.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,230.20 : 100,918.20 = 42,298.40 : x
  2. Step 2: Convert to fraction form
    67,230.20/100,918.20 = 42,298.40/x
  3. Step 3: Cross multiply
    67,230.20x = 100,918.20 × 42,298.40
  4. Step 4: Simplify right side
    67,230.20x = 4,268,678,390.88
  5. Step 5: Solve for x
    x = 4,268,678,390.88/67,230.20
  6. Step 6: Final answer
    x = 63,493.47

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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.