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Finding the Fourth Proportional to 211,230.72, 316,936.80 and 140,178.20

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Solution

The fourth proportional to 211,230.72, 316,936.80 and 140,178.20 is: 210,327.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,230.72 : 316,936.80 = 140,178.20 : x
  2. Step 2: Convert to fraction form
    211,230.72/316,936.80 = 140,178.20/x
  3. Step 3: Cross multiply
    211,230.72x = 316,936.80 × 140,178.20
  4. Step 4: Simplify right side
    211,230.72x = 44,427,628,553.08
  5. Step 5: Solve for x
    x = 44,427,628,553.08/211,230.72
  6. Step 6: Final answer
    x = 210,327.50

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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.