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Finding the Fourth Proportional to 75,692.76, 103,699.58 and 72,855.06

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Solution

The fourth proportional to 75,692.76, 103,699.58 and 72,855.06 is: 99,811.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,692.76 : 103,699.58 = 72,855.06 : x
  2. Step 2: Convert to fraction form
    75,692.76/103,699.58 = 72,855.06/x
  3. Step 3: Cross multiply
    75,692.76x = 103,699.58 × 72,855.06
  4. Step 4: Simplify right side
    75,692.76x = 7,555,039,122.87
  5. Step 5: Solve for x
    x = 7,555,039,122.87/75,692.76
  6. Step 6: Final answer
    x = 99,811.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.