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Finding the Fourth Proportional to 291,711, 437,640.36 and 81,348.93

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Solution

The fourth proportional to 291,711, 437,640.36 and 81,348.93 is: 122,043.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,711 : 437,640.36 = 81,348.93 : x
  2. Step 2: Convert to fraction form
    291,711/437,640.36 = 81,348.93/x
  3. Step 3: Cross multiply
    291,711x = 437,640.36 × 81,348.93
  4. Step 4: Simplify right side
    291,711x = 35,601,575,010.81
  5. Step 5: Solve for x
    x = 35,601,575,010.81/291,711
  6. Step 6: Final answer
    x = 122,043.99

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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.