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Finding the Fourth Proportional to 103,438.35, 155,448.17 and 61,324.41

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Solution

The fourth proportional to 103,438.35, 155,448.17 and 61,324.41 is: 92,158.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,438.35 : 155,448.17 = 61,324.41 : x
  2. Step 2: Convert to fraction form
    103,438.35/155,448.17 = 61,324.41/x
  3. Step 3: Cross multiply
    103,438.35x = 155,448.17 × 61,324.41
  4. Step 4: Simplify right side
    103,438.35x = 9,532,767,004.21
  5. Step 5: Solve for x
    x = 9,532,767,004.21/103,438.35
  6. Step 6: Final answer
    x = 92,158.92

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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.