Home / 123,380.70-185,157.45-79,115.10

Finding the Fourth Proportional to 123,380.70, 185,157.45 and 79,115.10

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Solution

The fourth proportional to 123,380.70, 185,157.45 and 79,115.10 is: 118,728.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,380.70 : 185,157.45 = 79,115.10 : x
  2. Step 2: Convert to fraction form
    123,380.70/185,157.45 = 79,115.10/x
  3. Step 3: Cross multiply
    123,380.70x = 185,157.45 × 79,115.10
  4. Step 4: Simplify right side
    123,380.70x = 14,648,750,172.50
  5. Step 5: Solve for x
    x = 14,648,750,172.50/123,380.70
  6. Step 6: Final answer
    x = 118,728.05

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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.