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Finding the Fourth Proportional to 239,615.40, 359,358.30 and 71,135.40

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Solution

The fourth proportional to 239,615.40, 359,358.30 and 71,135.40 is: 106,683.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,615.40 : 359,358.30 = 71,135.40 : x
  2. Step 2: Convert to fraction form
    239,615.40/359,358.30 = 71,135.40/x
  3. Step 3: Cross multiply
    239,615.40x = 359,358.30 × 71,135.40
  4. Step 4: Simplify right side
    239,615.40x = 25,563,096,413.82
  5. Step 5: Solve for x
    x = 25,563,096,413.82/239,615.40
  6. Step 6: Final answer
    x = 106,683.86

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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.