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Finding the Fourth Proportional to 291,731.44, 437,671.02 and 81,369.32

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Solution

The fourth proportional to 291,731.44, 437,671.02 and 81,369.32 is: 122,074.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,731.44 : 437,671.02 = 81,369.32 : x
  2. Step 2: Convert to fraction form
    291,731.44/437,671.02 = 81,369.32/x
  3. Step 3: Cross multiply
    291,731.44x = 437,671.02 × 81,369.32
  4. Step 4: Simplify right side
    291,731.44x = 35,612,993,281.11
  5. Step 5: Solve for x
    x = 35,612,993,281.11/291,731.44
  6. Step 6: Final answer
    x = 122,074.58

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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.