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Finding the Fourth Proportional to 213,006.70, 319,238.70 and 113,214.70

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Solution

The fourth proportional to 213,006.70, 319,238.70 and 113,214.70 is: 169,677.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,006.70 : 319,238.70 = 113,214.70 : x
  2. Step 2: Convert to fraction form
    213,006.70/319,238.70 = 113,214.70/x
  3. Step 3: Cross multiply
    213,006.70x = 319,238.70 × 113,214.70
  4. Step 4: Simplify right side
    213,006.70x = 36,142,513,648.89
  5. Step 5: Solve for x
    x = 36,142,513,648.89/213,006.70
  6. Step 6: Final answer
    x = 169,677.83

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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.