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Finding the Fourth Proportional to 137,720.20, 206,580.30 and 118,037.20

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Solution

The fourth proportional to 137,720.20, 206,580.30 and 118,037.20 is: 177,055.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,720.20 : 206,580.30 = 118,037.20 : x
  2. Step 2: Convert to fraction form
    137,720.20/206,580.30 = 118,037.20/x
  3. Step 3: Cross multiply
    137,720.20x = 206,580.30 × 118,037.20
  4. Step 4: Simplify right side
    137,720.20x = 24,384,160,187.16
  5. Step 5: Solve for x
    x = 24,384,160,187.16/137,720.20
  6. Step 6: Final answer
    x = 177,055.80

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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.