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Finding the Fourth Proportional to 239,491.60, 359,237.34 and 81,720.04

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Solution

The fourth proportional to 239,491.60, 359,237.34 and 81,720.04 is: 122,580.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,491.60 : 359,237.34 = 81,720.04 : x
  2. Step 2: Convert to fraction form
    239,491.60/359,237.34 = 81,720.04/x
  3. Step 3: Cross multiply
    239,491.60x = 359,237.34 × 81,720.04
  4. Step 4: Simplify right side
    239,491.60x = 29,356,889,794.29
  5. Step 5: Solve for x
    x = 29,356,889,794.29/239,491.60
  6. Step 6: Final answer
    x = 122,580.04

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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.