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Finding the Fourth Proportional to 103,485.46, 155,087.79 and 47,255.85

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Solution

The fourth proportional to 103,485.46, 155,087.79 and 47,255.85 is: 70,819.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,485.46 : 155,087.79 = 47,255.85 : x
  2. Step 2: Convert to fraction form
    103,485.46/155,087.79 = 47,255.85/x
  3. Step 3: Cross multiply
    103,485.46x = 155,087.79 × 47,255.85
  4. Step 4: Simplify right side
    103,485.46x = 7,328,805,341.07
  5. Step 5: Solve for x
    x = 7,328,805,341.07/103,485.46
  6. Step 6: Final answer
    x = 70,819.66

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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.