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Finding the Fourth Proportional to 75,020.40, 112,660.20 and 40,028.40

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Solution

The fourth proportional to 75,020.40, 112,660.20 and 40,028.40 is: 60,111.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,020.40 : 112,660.20 = 40,028.40 : x
  2. Step 2: Convert to fraction form
    75,020.40/112,660.20 = 40,028.40/x
  3. Step 3: Cross multiply
    75,020.40x = 112,660.20 × 40,028.40
  4. Step 4: Simplify right side
    75,020.40x = 4,509,607,549.68
  5. Step 5: Solve for x
    x = 4,509,607,549.68/75,020.40
  6. Step 6: Final answer
    x = 60,111.75

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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.