Home / 85,415.04-128,139.84-30,049.92

Finding the Fourth Proportional to 85,415.04, 128,139.84 and 30,049.92

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Solution

The fourth proportional to 85,415.04, 128,139.84 and 30,049.92 is: 45,080.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,415.04 : 128,139.84 = 30,049.92 : x
  2. Step 2: Convert to fraction form
    85,415.04/128,139.84 = 30,049.92/x
  3. Step 3: Cross multiply
    85,415.04x = 128,139.84 × 30,049.92
  4. Step 4: Simplify right side
    85,415.04x = 3,850,591,940.81
  5. Step 5: Solve for x
    x = 3,850,591,940.81/85,415.04
  6. Step 6: Final answer
    x = 45,080.96

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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.