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Finding the Fourth Proportional to 99,764.80, 149,572.80 and 60,313.60

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Solution

The fourth proportional to 99,764.80, 149,572.80 and 60,313.60 is: 90,425.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,764.80 : 149,572.80 = 60,313.60 : x
  2. Step 2: Convert to fraction form
    99,764.80/149,572.80 = 60,313.60/x
  3. Step 3: Cross multiply
    99,764.80x = 149,572.80 × 60,313.60
  4. Step 4: Simplify right side
    99,764.80x = 9,021,274,030.08
  5. Step 5: Solve for x
    x = 9,021,274,030.08/99,764.80
  6. Step 6: Final answer
    x = 90,425.42

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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.