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Finding the Fourth Proportional to 213,555.69, 320,311.67 and 55,763.64

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Solution

The fourth proportional to 213,555.69, 320,311.67 and 55,763.64 is: 83,639.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,555.69 : 320,311.67 = 55,763.64 : x
  2. Step 2: Convert to fraction form
    213,555.69/320,311.67 = 55,763.64/x
  3. Step 3: Cross multiply
    213,555.69x = 320,311.67 × 55,763.64
  4. Step 4: Simplify right side
    213,555.69x = 17,861,744,374.86
  5. Step 5: Solve for x
    x = 17,861,744,374.86/213,555.69
  6. Step 6: Final answer
    x = 83,639.75

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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.