Home / 87,985.60-131,594.40-78,692.80

Finding the Fourth Proportional to 87,985.60, 131,594.40 and 78,692.80

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Solution

The fourth proportional to 87,985.60, 131,594.40 and 78,692.80 is: 117,695.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,985.60 : 131,594.40 = 78,692.80 : x
  2. Step 2: Convert to fraction form
    87,985.60/131,594.40 = 78,692.80/x
  3. Step 3: Cross multiply
    87,985.60x = 131,594.40 × 78,692.80
  4. Step 4: Simplify right side
    87,985.60x = 10,355,531,800.32
  5. Step 5: Solve for x
    x = 10,355,531,800.32/87,985.60
  6. Step 6: Final answer
    x = 117,695.76

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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.