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Finding the Fourth Proportional to 218,801.70, 328,202.55 and 69,053.67

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Solution

The fourth proportional to 218,801.70, 328,202.55 and 69,053.67 is: 103,580.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,801.70 : 328,202.55 = 69,053.67 : x
  2. Step 2: Convert to fraction form
    218,801.70/328,202.55 = 69,053.67/x
  3. Step 3: Cross multiply
    218,801.70x = 328,202.55 × 69,053.67
  4. Step 4: Simplify right side
    218,801.70x = 22,663,590,580.86
  5. Step 5: Solve for x
    x = 22,663,590,580.86/218,801.70
  6. Step 6: Final answer
    x = 103,580.51

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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.