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Finding the Fourth Proportional to 99,503.80, 149,255.70 and 25,631.80

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Solution

The fourth proportional to 99,503.80, 149,255.70 and 25,631.80 is: 38,447.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,503.80 : 149,255.70 = 25,631.80 : x
  2. Step 2: Convert to fraction form
    99,503.80/149,255.70 = 25,631.80/x
  3. Step 3: Cross multiply
    99,503.80x = 149,255.70 × 25,631.80
  4. Step 4: Simplify right side
    99,503.80x = 3,825,692,251.26
  5. Step 5: Solve for x
    x = 3,825,692,251.26/99,503.80
  6. Step 6: Final answer
    x = 38,447.70

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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.