Home / 81,005.38-121,665.76-66,023.58

Finding the Fourth Proportional to 81,005.38, 121,665.76 and 66,023.58

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Solution

The fourth proportional to 81,005.38, 121,665.76 and 66,023.58 is: 99,163.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,005.38 : 121,665.76 = 66,023.58 : x
  2. Step 2: Convert to fraction form
    81,005.38/121,665.76 = 66,023.58/x
  3. Step 3: Cross multiply
    81,005.38x = 121,665.76 × 66,023.58
  4. Step 4: Simplify right side
    81,005.38x = 8,032,809,038.62
  5. Step 5: Solve for x
    x = 8,032,809,038.62/81,005.38
  6. Step 6: Final answer
    x = 99,163.90

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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.