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Finding the Fourth Proportional to 216,995.54, 325,335.59 and 90,671.95

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Solution

The fourth proportional to 216,995.54, 325,335.59 and 90,671.95 is: 135,942.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,995.54 : 325,335.59 = 90,671.95 : x
  2. Step 2: Convert to fraction form
    216,995.54/325,335.59 = 90,671.95/x
  3. Step 3: Cross multiply
    216,995.54x = 325,335.59 × 90,671.95
  4. Step 4: Simplify right side
    216,995.54x = 29,498,810,723.02
  5. Step 5: Solve for x
    x = 29,498,810,723.02/216,995.54
  6. Step 6: Final answer
    x = 135,942.01

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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.