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Finding the Fourth Proportional to 228,388.05, 342,604.95 and 78,608.52

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Solution

The fourth proportional to 228,388.05, 342,604.95 and 78,608.52 is: 117,920.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,388.05 : 342,604.95 = 78,608.52 : x
  2. Step 2: Convert to fraction form
    228,388.05/342,604.95 = 78,608.52/x
  3. Step 3: Cross multiply
    228,388.05x = 342,604.95 × 78,608.52
  4. Step 4: Simplify right side
    228,388.05x = 26,931,668,064.17
  5. Step 5: Solve for x
    x = 26,931,668,064.17/228,388.05
  6. Step 6: Final answer
    x = 117,920.65

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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.