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Finding the Fourth Proportional to 78,464.95, 117,692.03 and 25,156.15

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Solution

The fourth proportional to 78,464.95, 117,692.03 and 25,156.15 is: 37,732.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,464.95 : 117,692.03 = 25,156.15 : x
  2. Step 2: Convert to fraction form
    78,464.95/117,692.03 = 25,156.15/x
  3. Step 3: Cross multiply
    78,464.95x = 117,692.03 × 25,156.15
  4. Step 4: Simplify right side
    78,464.95x = 2,960,678,234.70
  5. Step 5: Solve for x
    x = 2,960,678,234.70/78,464.95
  6. Step 6: Final answer
    x = 37,732.49

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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.