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Finding the Fourth Proportional to 291,808.80, 437,713.20 and 81,446.40

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Solution

The fourth proportional to 291,808.80, 437,713.20 and 81,446.40 is: 122,169.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,808.80 : 437,713.20 = 81,446.40 : x
  2. Step 2: Convert to fraction form
    291,808.80/437,713.20 = 81,446.40/x
  3. Step 3: Cross multiply
    291,808.80x = 437,713.20 × 81,446.40
  4. Step 4: Simplify right side
    291,808.80x = 35,650,164,372.48
  5. Step 5: Solve for x
    x = 35,650,164,372.48/291,808.80
  6. Step 6: Final answer
    x = 122,169.60

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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.