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Finding the Fourth Proportional to 103,438.55, 155,176.05 and 36,917.30

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Solution

The fourth proportional to 103,438.55, 155,176.05 and 36,917.30 is: 55,382.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,438.55 : 155,176.05 = 36,917.30 : x
  2. Step 2: Convert to fraction form
    103,438.55/155,176.05 = 36,917.30/x
  3. Step 3: Cross multiply
    103,438.55x = 155,176.05 × 36,917.30
  4. Step 4: Simplify right side
    103,438.55x = 5,728,680,790.67
  5. Step 5: Solve for x
    x = 5,728,680,790.67/103,438.55
  6. Step 6: Final answer
    x = 55,382.45

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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.