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Finding the Fourth Proportional to 99,503.66, 149,327.63 and 74,610.74

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Solution

The fourth proportional to 99,503.66, 149,327.63 and 74,610.74 is: 111,970.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,503.66 : 149,327.63 = 74,610.74 : x
  2. Step 2: Convert to fraction form
    99,503.66/149,327.63 = 74,610.74/x
  3. Step 3: Cross multiply
    99,503.66x = 149,327.63 × 74,610.74
  4. Step 4: Simplify right side
    99,503.66x = 11,141,444,976.75
  5. Step 5: Solve for x
    x = 11,141,444,976.75/99,503.66
  6. Step 6: Final answer
    x = 111,970.20

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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.