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Finding the Fourth Proportional to 137,735.80, 206,603.70 and 115,428.40

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Solution

The fourth proportional to 137,735.80, 206,603.70 and 115,428.40 is: 173,142.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,735.80 : 206,603.70 = 115,428.40 : x
  2. Step 2: Convert to fraction form
    137,735.80/206,603.70 = 115,428.40/x
  3. Step 3: Cross multiply
    137,735.80x = 206,603.70 × 115,428.40
  4. Step 4: Simplify right side
    137,735.80x = 23,847,934,525.08
  5. Step 5: Solve for x
    x = 23,847,934,525.08/137,735.80
  6. Step 6: Final answer
    x = 173,142.60

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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.