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Finding the Fourth Proportional to 109,140.40, 150,620.34 and 61,396.84

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Solution

The fourth proportional to 109,140.40, 150,620.34 and 61,396.84 is: 84,731.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,140.40 : 150,620.34 = 61,396.84 : x
  2. Step 2: Convert to fraction form
    109,140.40/150,620.34 = 61,396.84/x
  3. Step 3: Cross multiply
    109,140.40x = 150,620.34 × 61,396.84
  4. Step 4: Simplify right side
    109,140.40x = 9,247,612,915.73
  5. Step 5: Solve for x
    x = 9,247,612,915.73/109,140.40
  6. Step 6: Final answer
    x = 84,731.35

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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.