Home / 120,940.20-181,410.30-87,503.40

Finding the Fourth Proportional to 120,940.20, 181,410.30 and 87,503.40

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Solution

The fourth proportional to 120,940.20, 181,410.30 and 87,503.40 is: 131,255.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,940.20 : 181,410.30 = 87,503.40 : x
  2. Step 2: Convert to fraction form
    120,940.20/181,410.30 = 87,503.40/x
  3. Step 3: Cross multiply
    120,940.20x = 181,410.30 × 87,503.40
  4. Step 4: Simplify right side
    120,940.20x = 15,874,018,045.02
  5. Step 5: Solve for x
    x = 15,874,018,045.02/120,940.20
  6. Step 6: Final answer
    x = 131,255.10

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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.