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Finding the Fourth Proportional to 291,438.78, 437,158.98 and 81,076.92

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Solution

The fourth proportional to 291,438.78, 437,158.98 and 81,076.92 is: 121,615.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,438.78 : 437,158.98 = 81,076.92 : x
  2. Step 2: Convert to fraction form
    291,438.78/437,158.98 = 81,076.92/x
  3. Step 3: Cross multiply
    291,438.78x = 437,158.98 × 81,076.92
  4. Step 4: Simplify right side
    291,438.78x = 35,443,503,648.74
  5. Step 5: Solve for x
    x = 35,443,503,648.74/291,438.78
  6. Step 6: Final answer
    x = 121,615.61

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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.