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Finding the Fourth Proportional to 291,717.36, 437,649.88 and 81,355.32

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Solution

The fourth proportional to 291,717.36, 437,649.88 and 81,355.32 is: 122,053.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,717.36 : 437,649.88 = 81,355.32 : x
  2. Step 2: Convert to fraction form
    291,717.36/437,649.88 = 81,355.32/x
  3. Step 3: Cross multiply
    291,717.36x = 437,649.88 × 81,355.32
  4. Step 4: Simplify right side
    291,717.36x = 35,605,146,035.36
  5. Step 5: Solve for x
    x = 35,605,146,035.36/291,717.36
  6. Step 6: Final answer
    x = 122,053.57

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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.