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Finding the Fourth Proportional to 291,486.54, 437,241.33 and 81,142.86

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Solution

The fourth proportional to 291,486.54, 437,241.33 and 81,142.86 is: 121,717.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,486.54 : 437,241.33 = 81,142.86 : x
  2. Step 2: Convert to fraction form
    291,486.54/437,241.33 = 81,142.86/x
  3. Step 3: Cross multiply
    291,486.54x = 437,241.33 × 81,142.86
  4. Step 4: Simplify right side
    291,486.54x = 35,479,012,026.40
  5. Step 5: Solve for x
    x = 35,479,012,026.40/291,486.54
  6. Step 6: Final answer
    x = 121,717.50

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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.