Home / 99,619.20-149,331.60-89,121.60

Finding the Fourth Proportional to 99,619.20, 149,331.60 and 89,121.60

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Solution

The fourth proportional to 99,619.20, 149,331.60 and 89,121.60 is: 133,595.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,619.20 : 149,331.60 = 89,121.60 : x
  2. Step 2: Convert to fraction form
    99,619.20/149,331.60 = 89,121.60/x
  3. Step 3: Cross multiply
    99,619.20x = 149,331.60 × 89,121.60
  4. Step 4: Simplify right side
    99,619.20x = 13,308,671,122.56
  5. Step 5: Solve for x
    x = 13,308,671,122.56/99,619.20
  6. Step 6: Final answer
    x = 133,595.44

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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.