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Finding the Fourth Proportional to 125,640.80, 188,461.20 and 105,957.80

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Solution

The fourth proportional to 125,640.80, 188,461.20 and 105,957.80 is: 158,936.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,640.80 : 188,461.20 = 105,957.80 : x
  2. Step 2: Convert to fraction form
    125,640.80/188,461.20 = 105,957.80/x
  3. Step 3: Cross multiply
    125,640.80x = 188,461.20 × 105,957.80
  4. Step 4: Simplify right side
    125,640.80x = 19,968,934,137.36
  5. Step 5: Solve for x
    x = 19,968,934,137.36/125,640.80
  6. Step 6: Final answer
    x = 158,936.70

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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.