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Finding the Fourth Proportional to 78,158.54, 117,236.18 and 18,994.52

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Solution

The fourth proportional to 78,158.54, 117,236.18 and 18,994.52 is: 28,491.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,158.54 : 117,236.18 = 18,994.52 : x
  2. Step 2: Convert to fraction form
    78,158.54/117,236.18 = 18,994.52/x
  3. Step 3: Cross multiply
    78,158.54x = 117,236.18 × 18,994.52
  4. Step 4: Simplify right side
    78,158.54x = 2,226,844,965.73
  5. Step 5: Solve for x
    x = 2,226,844,965.73/78,158.54
  6. Step 6: Final answer
    x = 28,491.38

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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.