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Finding the Fourth Proportional to 99,663.50, 149,495.25 and 40,503.78

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Solution

The fourth proportional to 99,663.50, 149,495.25 and 40,503.78 is: 60,755.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,663.50 : 149,495.25 = 40,503.78 : x
  2. Step 2: Convert to fraction form
    99,663.50/149,495.25 = 40,503.78/x
  3. Step 3: Cross multiply
    99,663.50x = 149,495.25 × 40,503.78
  4. Step 4: Simplify right side
    99,663.50x = 6,055,122,717.05
  5. Step 5: Solve for x
    x = 6,055,122,717.05/99,663.50
  6. Step 6: Final answer
    x = 60,755.67

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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.