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Finding the Fourth Proportional to 69,530.78, 103,401.67 and 67,316.45

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Solution

The fourth proportional to 69,530.78, 103,401.67 and 67,316.45 is: 100,108.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,530.78 : 103,401.67 = 67,316.45 : x
  2. Step 2: Convert to fraction form
    69,530.78/103,401.67 = 67,316.45/x
  3. Step 3: Cross multiply
    69,530.78x = 103,401.67 × 67,316.45
  4. Step 4: Simplify right side
    69,530.78x = 6,960,633,348.47
  5. Step 5: Solve for x
    x = 6,960,633,348.47/69,530.78
  6. Step 6: Final answer
    x = 100,108.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.