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Finding the Fourth Proportional to 99,729.80, 149,520.30 and 60,278.60

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Solution

The fourth proportional to 99,729.80, 149,520.30 and 60,278.60 is: 90,372.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,729.80 : 149,520.30 = 60,278.60 : x
  2. Step 2: Convert to fraction form
    99,729.80/149,520.30 = 60,278.60/x
  3. Step 3: Cross multiply
    99,729.80x = 149,520.30 × 60,278.60
  4. Step 4: Simplify right side
    99,729.80x = 9,012,874,355.58
  5. Step 5: Solve for x
    x = 9,012,874,355.58/99,729.80
  6. Step 6: Final answer
    x = 90,372.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.