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Finding the Fourth Proportional to 138,907.53, 191,692.20 and 75,245.58

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Solution

The fourth proportional to 138,907.53, 191,692.20 and 75,245.58 is: 103,838.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,907.53 : 191,692.20 = 75,245.58 : x
  2. Step 2: Convert to fraction form
    138,907.53/191,692.20 = 75,245.58/x
  3. Step 3: Cross multiply
    138,907.53x = 191,692.20 × 75,245.58
  4. Step 4: Simplify right side
    138,907.53x = 14,423,990,770.48
  5. Step 5: Solve for x
    x = 14,423,990,770.48/138,907.53
  6. Step 6: Final answer
    x = 103,838.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.