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Finding the Fourth Proportional to 291,961.53, 437,920.43 and 81,615.87

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Solution

The fourth proportional to 291,961.53, 437,920.43 and 81,615.87 is: 122,417.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,961.53 : 437,920.43 = 81,615.87 : x
  2. Step 2: Convert to fraction form
    291,961.53/437,920.43 = 81,615.87/x
  3. Step 3: Cross multiply
    291,961.53x = 437,920.43 × 81,615.87
  4. Step 4: Simplify right side
    291,961.53x = 35,741,256,477.14
  5. Step 5: Solve for x
    x = 35,741,256,477.14/291,961.53
  6. Step 6: Final answer
    x = 122,417.69

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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.