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Finding the Fourth Proportional to 156,680.80, 235,021.20 and 139,622.20

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Solution

The fourth proportional to 156,680.80, 235,021.20 and 139,622.20 is: 209,433.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,680.80 : 235,021.20 = 139,622.20 : x
  2. Step 2: Convert to fraction form
    156,680.80/235,021.20 = 139,622.20/x
  3. Step 3: Cross multiply
    156,680.80x = 235,021.20 × 139,622.20
  4. Step 4: Simplify right side
    156,680.80x = 32,814,176,990.64
  5. Step 5: Solve for x
    x = 32,814,176,990.64/156,680.80
  6. Step 6: Final answer
    x = 209,433.30

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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.