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Finding the Fourth Proportional to 137,734.60, 206,601.90 and 121,113.40

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Solution

The fourth proportional to 137,734.60, 206,601.90 and 121,113.40 is: 181,670.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,734.60 : 206,601.90 = 121,113.40 : x
  2. Step 2: Convert to fraction form
    137,734.60/206,601.90 = 121,113.40/x
  3. Step 3: Cross multiply
    137,734.60x = 206,601.90 × 121,113.40
  4. Step 4: Simplify right side
    137,734.60x = 25,022,258,555.46
  5. Step 5: Solve for x
    x = 25,022,258,555.46/137,734.60
  6. Step 6: Final answer
    x = 181,670.10

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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.