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Finding the Fourth Proportional to 99,515.70, 149,273.55 and 76,965.30

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Solution

The fourth proportional to 99,515.70, 149,273.55 and 76,965.30 is: 115,447.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,515.70 : 149,273.55 = 76,965.30 : x
  2. Step 2: Convert to fraction form
    99,515.70/149,273.55 = 76,965.30/x
  3. Step 3: Cross multiply
    99,515.70x = 149,273.55 × 76,965.30
  4. Step 4: Simplify right side
    99,515.70x = 11,488,883,557.82
  5. Step 5: Solve for x
    x = 11,488,883,557.82/99,515.70
  6. Step 6: Final answer
    x = 115,447.95

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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.