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Finding the Fourth Proportional to 291,382.88, 437,099.07 and 81,020.81

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Solution

The fourth proportional to 291,382.88, 437,099.07 and 81,020.81 is: 121,538.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,382.88 : 437,099.07 = 81,020.81 : x
  2. Step 2: Convert to fraction form
    291,382.88/437,099.07 = 81,020.81/x
  3. Step 3: Cross multiply
    291,382.88x = 437,099.07 × 81,020.81
  4. Step 4: Simplify right side
    291,382.88x = 35,414,121,642.48
  5. Step 5: Solve for x
    x = 35,414,121,642.48/291,382.88
  6. Step 6: Final answer
    x = 121,538.10

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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.