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Finding the Fourth Proportional to 103,658.93, 155,389.87 and 40,519.53

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Solution

The fourth proportional to 103,658.93, 155,389.87 and 40,519.53 is: 60,740.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,658.93 : 155,389.87 = 40,519.53 : x
  2. Step 2: Convert to fraction form
    103,658.93/155,389.87 = 40,519.53/x
  3. Step 3: Cross multiply
    103,658.93x = 155,389.87 × 40,519.53
  4. Step 4: Simplify right side
    103,658.93x = 6,296,324,499.16
  5. Step 5: Solve for x
    x = 6,296,324,499.16/103,658.93
  6. Step 6: Final answer
    x = 60,740.78

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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.