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Finding the Fourth Proportional to 291,476.72, 437,215.08 and 81,131.06

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Solution

The fourth proportional to 291,476.72, 437,215.08 and 81,131.06 is: 121,696.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,476.72 : 437,215.08 = 81,131.06 : x
  2. Step 2: Convert to fraction form
    291,476.72/437,215.08 = 81,131.06/x
  3. Step 3: Cross multiply
    291,476.72x = 437,215.08 × 81,131.06
  4. Step 4: Simplify right side
    291,476.72x = 35,471,722,888.38
  5. Step 5: Solve for x
    x = 35,471,722,888.38/291,476.72
  6. Step 6: Final answer
    x = 121,696.59

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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.