Home / 90,145.10-135,239.79-30,981.62

Finding the Fourth Proportional to 90,145.10, 135,239.79 and 30,981.62

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Solution

The fourth proportional to 90,145.10, 135,239.79 and 30,981.62 is: 46,480.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,145.10 : 135,239.79 = 30,981.62 : x
  2. Step 2: Convert to fraction form
    90,145.10/135,239.79 = 30,981.62/x
  3. Step 3: Cross multiply
    90,145.10x = 135,239.79 × 30,981.62
  4. Step 4: Simplify right side
    90,145.10x = 4,189,947,782.66
  5. Step 5: Solve for x
    x = 4,189,947,782.66/90,145.10
  6. Step 6: Final answer
    x = 46,480.04

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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.