Home / 117,639.12-162,231.30-90,739.02

Finding the Fourth Proportional to 117,639.12, 162,231.30 and 90,739.02

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Solution

The fourth proportional to 117,639.12, 162,231.30 and 90,739.02 is: 125,134.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,639.12 : 162,231.30 = 90,739.02 : x
  2. Step 2: Convert to fraction form
    117,639.12/162,231.30 = 90,739.02/x
  3. Step 3: Cross multiply
    117,639.12x = 162,231.30 × 90,739.02
  4. Step 4: Simplify right side
    117,639.12x = 14,720,709,175.33
  5. Step 5: Solve for x
    x = 14,720,709,175.33/117,639.12
  6. Step 6: Final answer
    x = 125,134.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.