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Finding the Fourth Proportional to 75,503.80, 113,255.70 and 31,107.70

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Solution

The fourth proportional to 75,503.80, 113,255.70 and 31,107.70 is: 46,661.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,503.80 : 113,255.70 = 31,107.70 : x
  2. Step 2: Convert to fraction form
    75,503.80/113,255.70 = 31,107.70/x
  3. Step 3: Cross multiply
    75,503.80x = 113,255.70 × 31,107.70
  4. Step 4: Simplify right side
    75,503.80x = 3,523,124,338.89
  5. Step 5: Solve for x
    x = 3,523,124,338.89/75,503.80
  6. Step 6: Final answer
    x = 46,661.55

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1.5x scale

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.