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Finding the Fourth Proportional to 90,938.50, 125,512.56 and 51,194.50

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Solution

The fourth proportional to 90,938.50, 125,512.56 and 51,194.50 is: 70,658.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,938.50 : 125,512.56 = 51,194.50 : x
  2. Step 2: Convert to fraction form
    90,938.50/125,512.56 = 51,194.50/x
  3. Step 3: Cross multiply
    90,938.50x = 125,512.56 × 51,194.50
  4. Step 4: Simplify right side
    90,938.50x = 6,425,552,752.92
  5. Step 5: Solve for x
    x = 6,425,552,752.92/90,938.50
  6. Step 6: Final answer
    x = 70,658.22

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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.