Home / 120,410.33-180,485.13-78,320.49

Finding the Fourth Proportional to 120,410.33, 180,485.13 and 78,320.49

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Solution

The fourth proportional to 120,410.33, 180,485.13 and 78,320.49 is: 117,395.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,410.33 : 180,485.13 = 78,320.49 : x
  2. Step 2: Convert to fraction form
    120,410.33/180,485.13 = 78,320.49/x
  3. Step 3: Cross multiply
    120,410.33x = 180,485.13 × 78,320.49
  4. Step 4: Simplify right side
    120,410.33x = 14,135,684,466.33
  5. Step 5: Solve for x
    x = 14,135,684,466.33/120,410.33
  6. Step 6: Final answer
    x = 117,395.94

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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.