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Finding the Fourth Proportional to 291,718.36, 437,651.38 and 81,356.32

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Solution

The fourth proportional to 291,718.36, 437,651.38 and 81,356.32 is: 122,055.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,718.36 : 437,651.38 = 81,356.32 : x
  2. Step 2: Convert to fraction form
    291,718.36/437,651.38 = 81,356.32/x
  3. Step 3: Cross multiply
    291,718.36x = 437,651.38 × 81,356.32
  4. Step 4: Simplify right side
    291,718.36x = 35,605,705,719.72
  5. Step 5: Solve for x
    x = 35,605,705,719.72/291,718.36
  6. Step 6: Final answer
    x = 122,055.07

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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.