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Finding the Fourth Proportional to 239,591.93, 359,430.92 and 81,783.47

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Solution

The fourth proportional to 239,591.93, 359,430.92 and 81,783.47 is: 122,689.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,591.93 : 359,430.92 = 81,783.47 : x
  2. Step 2: Convert to fraction form
    239,591.93/359,430.92 = 81,783.47/x
  3. Step 3: Cross multiply
    239,591.93x = 359,430.92 × 81,783.47
  4. Step 4: Simplify right side
    239,591.93x = 29,395,508,659.24
  5. Step 5: Solve for x
    x = 29,395,508,659.24/239,591.93
  6. Step 6: Final answer
    x = 122,689.90

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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.