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Finding the Fourth Proportional to 137,116.20, 205,688.70 and 43,600.20

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Solution

The fourth proportional to 137,116.20, 205,688.70 and 43,600.20 is: 65,404.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,116.20 : 205,688.70 = 43,600.20 : x
  2. Step 2: Convert to fraction form
    137,116.20/205,688.70 = 43,600.20/x
  3. Step 3: Cross multiply
    137,116.20x = 205,688.70 × 43,600.20
  4. Step 4: Simplify right side
    137,116.20x = 8,968,068,457.74
  5. Step 5: Solve for x
    x = 8,968,068,457.74/137,116.20
  6. Step 6: Final answer
    x = 65,404.88

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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.