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Finding the Fourth Proportional to 185,763.40, 278,645.10 and 67,438.60

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Solution

The fourth proportional to 185,763.40, 278,645.10 and 67,438.60 is: 101,157.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,763.40 : 278,645.10 = 67,438.60 : x
  2. Step 2: Convert to fraction form
    185,763.40/278,645.10 = 67,438.60/x
  3. Step 3: Cross multiply
    185,763.40x = 278,645.10 × 67,438.60
  4. Step 4: Simplify right side
    185,763.40x = 18,791,435,440.86
  5. Step 5: Solve for x
    x = 18,791,435,440.86/185,763.40
  6. Step 6: Final answer
    x = 101,157.90

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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.