Home / 90,678.11-125,138.82-50,393.57

Finding the Fourth Proportional to 90,678.11, 125,138.82 and 50,393.57

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Solution

The fourth proportional to 90,678.11, 125,138.82 and 50,393.57 is: 69,544.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,678.11 : 125,138.82 = 50,393.57 : x
  2. Step 2: Convert to fraction form
    90,678.11/125,138.82 = 50,393.57/x
  3. Step 3: Cross multiply
    90,678.11x = 125,138.82 × 50,393.57
  4. Step 4: Simplify right side
    90,678.11x = 6,306,191,448.67
  5. Step 5: Solve for x
    x = 6,306,191,448.67/90,678.11
  6. Step 6: Final answer
    x = 69,544.81

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1.5x scale

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.