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Finding the Fourth Proportional to 291,731.73, 437,558.72 and 81,390.93

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Solution

The fourth proportional to 291,731.73, 437,558.72 and 81,390.93 is: 122,075.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,731.73 : 437,558.72 = 81,390.93 : x
  2. Step 2: Convert to fraction form
    291,731.73/437,558.72 = 81,390.93/x
  3. Step 3: Cross multiply
    291,731.73x = 437,558.72 × 81,390.93
  4. Step 4: Simplify right side
    291,731.73x = 35,613,310,743.46
  5. Step 5: Solve for x
    x = 35,613,310,743.46/291,731.73
  6. Step 6: Final answer
    x = 122,075.55

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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.