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Finding the Fourth Proportional to 188,426.70, 282,202.65 and 128,940.30

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Solution

The fourth proportional to 188,426.70, 282,202.65 and 128,940.30 is: 193,111.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,426.70 : 282,202.65 = 128,940.30 : x
  2. Step 2: Convert to fraction form
    188,426.70/282,202.65 = 128,940.30/x
  3. Step 3: Cross multiply
    188,426.70x = 282,202.65 × 128,940.30
  4. Step 4: Simplify right side
    188,426.70x = 36,387,294,351.80
  5. Step 5: Solve for x
    x = 36,387,294,351.80/188,426.70
  6. Step 6: Final answer
    x = 193,111.14

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1.5x scale

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.