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Finding the Fourth Proportional to 90,778.50, 125,274.33 and 51,034.50

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Solution

The fourth proportional to 90,778.50, 125,274.33 and 51,034.50 is: 70,427.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,778.50 : 125,274.33 = 51,034.50 : x
  2. Step 2: Convert to fraction form
    90,778.50/125,274.33 = 51,034.50/x
  3. Step 3: Cross multiply
    90,778.50x = 125,274.33 × 51,034.50
  4. Step 4: Simplify right side
    90,778.50x = 6,393,312,794.39
  5. Step 5: Solve for x
    x = 6,393,312,794.39/90,778.50
  6. Step 6: Final answer
    x = 70,427.61

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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.