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Finding the Fourth Proportional to 291,724.88, 437,661.16 and 81,362.81

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Solution

The fourth proportional to 291,724.88, 437,661.16 and 81,362.81 is: 122,064.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,724.88 : 437,661.16 = 81,362.81 : x
  2. Step 2: Convert to fraction form
    291,724.88/437,661.16 = 81,362.81/x
  3. Step 3: Cross multiply
    291,724.88x = 437,661.16 × 81,362.81
  4. Step 4: Simplify right side
    291,724.88x = 35,609,342,696.21
  5. Step 5: Solve for x
    x = 35,609,342,696.21/291,724.88
  6. Step 6: Final answer
    x = 122,064.81

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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.