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Finding the Fourth Proportional to 99,459.40, 149,189.10 and 69,910.60

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Solution

The fourth proportional to 99,459.40, 149,189.10 and 69,910.60 is: 104,865.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,459.40 : 149,189.10 = 69,910.60 : x
  2. Step 2: Convert to fraction form
    99,459.40/149,189.10 = 69,910.60/x
  3. Step 3: Cross multiply
    99,459.40x = 149,189.10 × 69,910.60
  4. Step 4: Simplify right side
    99,459.40x = 10,429,899,494.46
  5. Step 5: Solve for x
    x = 10,429,899,494.46/99,459.40
  6. Step 6: Final answer
    x = 104,865.90

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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.