Home / 76,789.64-105,874.08-64,061.30

Finding the Fourth Proportional to 76,789.64, 105,874.08 and 64,061.30

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Solution

The fourth proportional to 76,789.64, 105,874.08 and 64,061.30 is: 88,324.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,789.64 : 105,874.08 = 64,061.30 : x
  2. Step 2: Convert to fraction form
    76,789.64/105,874.08 = 64,061.30/x
  3. Step 3: Cross multiply
    76,789.64x = 105,874.08 × 64,061.30
  4. Step 4: Simplify right side
    76,789.64x = 6,782,431,201.10
  5. Step 5: Solve for x
    x = 6,782,431,201.10/76,789.64
  6. Step 6: Final answer
    x = 88,324.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.