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Finding the Fourth Proportional to 213,959.27, 320,989.57 and 69,864.39

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Solution

The fourth proportional to 213,959.27, 320,989.57 and 69,864.39 is: 104,813.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,959.27 : 320,989.57 = 69,864.39 : x
  2. Step 2: Convert to fraction form
    213,959.27/320,989.57 = 69,864.39/x
  3. Step 3: Cross multiply
    213,959.27x = 320,989.57 × 69,864.39
  4. Step 4: Simplify right side
    213,959.27x = 22,425,740,329.75
  5. Step 5: Solve for x
    x = 22,425,740,329.75/213,959.27
  6. Step 6: Final answer
    x = 104,813.13

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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.