Home / 218,815.13-328,222.78-69,070.57

Finding the Fourth Proportional to 218,815.13, 328,222.78 and 69,070.57

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Solution

The fourth proportional to 218,815.13, 328,222.78 and 69,070.57 is: 103,605.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,815.13 : 328,222.78 = 69,070.57 : x
  2. Step 2: Convert to fraction form
    218,815.13/328,222.78 = 69,070.57/x
  3. Step 3: Cross multiply
    218,815.13x = 328,222.78 × 69,070.57
  4. Step 4: Simplify right side
    218,815.13x = 22,670,533,508.35
  5. Step 5: Solve for x
    x = 22,670,533,508.35/218,815.13
  6. Step 6: Final answer
    x = 103,605.88

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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.