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Finding the Fourth Proportional to 291,726.88, 437,664.15 and 81,364.82

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Solution

The fourth proportional to 291,726.88, 437,664.15 and 81,364.82 is: 122,067.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,726.88 : 437,664.15 = 81,364.82 : x
  2. Step 2: Convert to fraction form
    291,726.88/437,664.15 = 81,364.82/x
  3. Step 3: Cross multiply
    291,726.88x = 437,664.15 × 81,364.82
  4. Step 4: Simplify right side
    291,726.88x = 35,610,464,785.20
  5. Step 5: Solve for x
    x = 35,610,464,785.20/291,726.88
  6. Step 6: Final answer
    x = 122,067.82

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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.