Home / 80,887.82-121,154.94-66,688.31

Finding the Fourth Proportional to 80,887.82, 121,154.94 and 66,688.31

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Solution

The fourth proportional to 80,887.82, 121,154.94 and 66,688.31 is: 99,886.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,887.82 : 121,154.94 = 66,688.31 : x
  2. Step 2: Convert to fraction form
    80,887.82/121,154.94 = 66,688.31/x
  3. Step 3: Cross multiply
    80,887.82x = 121,154.94 × 66,688.31
  4. Step 4: Simplify right side
    80,887.82x = 8,079,618,499.64
  5. Step 5: Solve for x
    x = 8,079,618,499.64/80,887.82
  6. Step 6: Final answer
    x = 99,886.72

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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.