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Finding the Fourth Proportional to 239,793.90, 359,656.83 and 81,999.42

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Solution

The fourth proportional to 239,793.90, 359,656.83 and 81,999.42 is: 122,987.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,793.90 : 359,656.83 = 81,999.42 : x
  2. Step 2: Convert to fraction form
    239,793.90/359,656.83 = 81,999.42/x
  3. Step 3: Cross multiply
    239,793.90x = 359,656.83 × 81,999.42
  4. Step 4: Simplify right side
    239,793.90x = 29,491,651,459.04
  5. Step 5: Solve for x
    x = 29,491,651,459.04/239,793.90
  6. Step 6: Final answer
    x = 122,987.50

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1.5x scale

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.