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Finding the Fourth Proportional to 291,872.40, 437,776.20 and 81,531.60

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Solution

The fourth proportional to 291,872.40, 437,776.20 and 81,531.60 is: 122,288.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,872.40 : 437,776.20 = 81,531.60 : x
  2. Step 2: Convert to fraction form
    291,872.40/437,776.20 = 81,531.60/x
  3. Step 3: Cross multiply
    291,872.40x = 437,776.20 × 81,531.60
  4. Step 4: Simplify right side
    291,872.40x = 35,692,594,027.92
  5. Step 5: Solve for x
    x = 35,692,594,027.92/291,872.40
  6. Step 6: Final answer
    x = 122,288.35

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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.