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Finding the Fourth Proportional to 291,841.92, 437,698.56 and 81,423.36

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Solution

The fourth proportional to 291,841.92, 437,698.56 and 81,423.36 is: 122,117.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,841.92 : 437,698.56 = 81,423.36 : x
  2. Step 2: Convert to fraction form
    291,841.92/437,698.56 = 81,423.36/x
  3. Step 3: Cross multiply
    291,841.92x = 437,698.56 × 81,423.36
  4. Step 4: Simplify right side
    291,841.92x = 35,638,887,422.36
  5. Step 5: Solve for x
    x = 35,638,887,422.36/291,841.92
  6. Step 6: Final answer
    x = 122,117.09

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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.