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Finding the Fourth Proportional to 87,692.70, 121,012.98 and 55,444.67

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Solution

The fourth proportional to 87,692.70, 121,012.98 and 55,444.67 is: 76,511.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,692.70 : 121,012.98 = 55,444.67 : x
  2. Step 2: Convert to fraction form
    87,692.70/121,012.98 = 55,444.67/x
  3. Step 3: Cross multiply
    87,692.70x = 121,012.98 × 55,444.67
  4. Step 4: Simplify right side
    87,692.70x = 6,709,524,741.82
  5. Step 5: Solve for x
    x = 6,709,524,741.82/87,692.70
  6. Step 6: Final answer
    x = 76,511.78

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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.