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Finding the Fourth Proportional to 137,208.20, 205,812.30 and 104,030.60

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Solution

The fourth proportional to 137,208.20, 205,812.30 and 104,030.60 is: 156,045.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,208.20 : 205,812.30 = 104,030.60 : x
  2. Step 2: Convert to fraction form
    137,208.20/205,812.30 = 104,030.60/x
  3. Step 3: Cross multiply
    137,208.20x = 205,812.30 × 104,030.60
  4. Step 4: Simplify right side
    137,208.20x = 21,410,777,056.38
  5. Step 5: Solve for x
    x = 21,410,777,056.38/137,208.20
  6. Step 6: Final answer
    x = 156,045.90

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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.