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Finding the Fourth Proportional to 213,091.38, 319,689.12 and 70,936.38

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Solution

The fourth proportional to 213,091.38, 319,689.12 and 70,936.38 is: 106,421.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,091.38 : 319,689.12 = 70,936.38 : x
  2. Step 2: Convert to fraction form
    213,091.38/319,689.12 = 70,936.38/x
  3. Step 3: Cross multiply
    213,091.38x = 319,689.12 × 70,936.38
  4. Step 4: Simplify right side
    213,091.38x = 22,677,588,898.19
  5. Step 5: Solve for x
    x = 22,677,588,898.19/213,091.38
  6. Step 6: Final answer
    x = 106,421.90

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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.