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Finding the Fourth Proportional to 291,902.40, 437,821.20 and 81,561.60

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Solution

The fourth proportional to 291,902.40, 437,821.20 and 81,561.60 is: 122,333.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,902.40 : 437,821.20 = 81,561.60 : x
  2. Step 2: Convert to fraction form
    291,902.40/437,821.20 = 81,561.60/x
  3. Step 3: Cross multiply
    291,902.40x = 437,821.20 × 81,561.60
  4. Step 4: Simplify right side
    291,902.40x = 35,709,397,585.92
  5. Step 5: Solve for x
    x = 35,709,397,585.92/291,902.40
  6. Step 6: Final answer
    x = 122,333.35

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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.