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Finding the Fourth Proportional to 99,765.78, 149,648.68 and 66,550.72

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Solution

The fourth proportional to 99,765.78, 149,648.68 and 66,550.72 is: 99,826.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,765.78 : 149,648.68 = 66,550.72 : x
  2. Step 2: Convert to fraction form
    99,765.78/149,648.68 = 66,550.72/x
  3. Step 3: Cross multiply
    99,765.78x = 149,648.68 × 66,550.72
  4. Step 4: Simplify right side
    99,765.78x = 9,959,226,652.81
  5. Step 5: Solve for x
    x = 9,959,226,652.81/99,765.78
  6. Step 6: Final answer
    x = 99,826.08

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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.