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Finding the Fourth Proportional to 188,130.70, 281,758.65 and 128,644.30

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Solution

The fourth proportional to 188,130.70, 281,758.65 and 128,644.30 is: 192,667.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,130.70 : 281,758.65 = 128,644.30 : x
  2. Step 2: Convert to fraction form
    188,130.70/281,758.65 = 128,644.30/x
  3. Step 3: Cross multiply
    188,130.70x = 281,758.65 × 128,644.30
  4. Step 4: Simplify right side
    188,130.70x = 36,246,644,298.20
  5. Step 5: Solve for x
    x = 36,246,644,298.20/188,130.70
  6. Step 6: Final answer
    x = 192,667.35

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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.