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Finding the Fourth Proportional to 291,710.26, 437,639.20 and 81,348.18

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Solution

The fourth proportional to 291,710.26, 437,639.20 and 81,348.18 is: 122,042.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,710.26 : 437,639.20 = 81,348.18 : x
  2. Step 2: Convert to fraction form
    291,710.26/437,639.20 = 81,348.18/x
  3. Step 3: Cross multiply
    291,710.26x = 437,639.20 × 81,348.18
  4. Step 4: Simplify right side
    291,710.26x = 35,601,152,416.66
  5. Step 5: Solve for x
    x = 35,601,152,416.66/291,710.26
  6. Step 6: Final answer
    x = 122,042.85

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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.