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Finding the Fourth Proportional to 99,861.80, 149,792.70 and 92,258.60

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Solution

The fourth proportional to 99,861.80, 149,792.70 and 92,258.60 is: 138,387.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,861.80 : 149,792.70 = 92,258.60 : x
  2. Step 2: Convert to fraction form
    99,861.80/149,792.70 = 92,258.60/x
  3. Step 3: Cross multiply
    99,861.80x = 149,792.70 × 92,258.60
  4. Step 4: Simplify right side
    99,861.80x = 13,819,664,792.22
  5. Step 5: Solve for x
    x = 13,819,664,792.22/99,861.80
  6. Step 6: Final answer
    x = 138,387.90

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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.