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Finding the Fourth Proportional to 75,112.68, 112,628.61 and 30,111.45

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Solution

The fourth proportional to 75,112.68, 112,628.61 and 30,111.45 is: 45,150.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,112.68 : 112,628.61 = 30,111.45 : x
  2. Step 2: Convert to fraction form
    75,112.68/112,628.61 = 30,111.45/x
  3. Step 3: Cross multiply
    75,112.68x = 112,628.61 × 30,111.45
  4. Step 4: Simplify right side
    75,112.68x = 3,391,410,758.58
  5. Step 5: Solve for x
    x = 3,391,410,758.58/75,112.68
  6. Step 6: Final answer
    x = 45,150.98

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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.