Home / 90,913.62-125,439.66-55,095.78

Finding the Fourth Proportional to 90,913.62, 125,439.66 and 55,095.78

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Solution

The fourth proportional to 90,913.62, 125,439.66 and 55,095.78 is: 76,019.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,913.62 : 125,439.66 = 55,095.78 : x
  2. Step 2: Convert to fraction form
    90,913.62/125,439.66 = 55,095.78/x
  3. Step 3: Cross multiply
    90,913.62x = 125,439.66 × 55,095.78
  4. Step 4: Simplify right side
    90,913.62x = 6,911,195,910.63
  5. Step 5: Solve for x
    x = 6,911,195,910.63/90,913.62
  6. Step 6: Final answer
    x = 76,019.37

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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.