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Finding the Fourth Proportional to 291,753.09, 437,703.44 and 81,390.87

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Solution

The fourth proportional to 291,753.09, 437,703.44 and 81,390.87 is: 122,106.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,753.09 : 437,703.44 = 81,390.87 : x
  2. Step 2: Convert to fraction form
    291,753.09/437,703.44 = 81,390.87/x
  3. Step 3: Cross multiply
    291,753.09x = 437,703.44 × 81,390.87
  4. Step 4: Simplify right side
    291,753.09x = 35,625,063,376.64
  5. Step 5: Solve for x
    x = 35,625,063,376.64/291,753.09
  6. Step 6: Final answer
    x = 122,106.89

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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.