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Finding the Fourth Proportional to 75,113.43, 112,629.74 and 30,112.20

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Solution

The fourth proportional to 75,113.43, 112,629.74 and 30,112.20 is: 45,152.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,113.43 : 112,629.74 = 30,112.20 : x
  2. Step 2: Convert to fraction form
    75,113.43/112,629.74 = 30,112.20/x
  3. Step 3: Cross multiply
    75,113.43x = 112,629.74 × 30,112.20
  4. Step 4: Simplify right side
    75,113.43x = 3,391,529,106.27
  5. Step 5: Solve for x
    x = 3,391,529,106.27/75,113.43
  6. Step 6: Final answer
    x = 45,152.10

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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.