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Finding the Fourth Proportional to 90,915.34, 125,459.67 and 50,630.80

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Solution

The fourth proportional to 90,915.34, 125,459.67 and 50,630.80 is: 69,868.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,915.34 : 125,459.67 = 50,630.80 : x
  2. Step 2: Convert to fraction form
    90,915.34/125,459.67 = 50,630.80/x
  3. Step 3: Cross multiply
    90,915.34x = 125,459.67 × 50,630.80
  4. Step 4: Simplify right side
    90,915.34x = 6,352,123,459.84
  5. Step 5: Solve for x
    x = 6,352,123,459.84/90,915.34
  6. Step 6: Final answer
    x = 69,868.56

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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.