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Finding the Fourth Proportional to 75,212.40, 112,948.20 and 40,220.40

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Solution

The fourth proportional to 75,212.40, 112,948.20 and 40,220.40 is: 60,399.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,212.40 : 112,948.20 = 40,220.40 : x
  2. Step 2: Convert to fraction form
    75,212.40/112,948.20 = 40,220.40/x
  3. Step 3: Cross multiply
    75,212.40x = 112,948.20 × 40,220.40
  4. Step 4: Simplify right side
    75,212.40x = 4,542,821,783.28
  5. Step 5: Solve for x
    x = 4,542,821,783.28/75,212.40
  6. Step 6: Final answer
    x = 60,399.90

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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.