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Finding the Fourth Proportional to 291,668.98, 437,505.27 and 81,308.74

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Solution

The fourth proportional to 291,668.98, 437,505.27 and 81,308.74 is: 121,963.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,668.98 : 437,505.27 = 81,308.74 : x
  2. Step 2: Convert to fraction form
    291,668.98/437,505.27 = 81,308.74/x
  3. Step 3: Cross multiply
    291,668.98x = 437,505.27 × 81,308.74
  4. Step 4: Simplify right side
    291,668.98x = 35,573,002,247.06
  5. Step 5: Solve for x
    x = 35,573,002,247.06/291,668.98
  6. Step 6: Final answer
    x = 121,963.61

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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.