Home / 120,619.98-180,931.14-45,720

Finding the Fourth Proportional to 120,619.98, 180,931.14 and 45,720

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Solution

The fourth proportional to 120,619.98, 180,931.14 and 45,720 is: 68,580.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,619.98 : 180,931.14 = 45,720 : x
  2. Step 2: Convert to fraction form
    120,619.98/180,931.14 = 45,720/x
  3. Step 3: Cross multiply
    120,619.98x = 180,931.14 × 45,720
  4. Step 4: Simplify right side
    120,619.98x = 8,272,171,720.80
  5. Step 5: Solve for x
    x = 8,272,171,720.80/120,619.98
  6. Step 6: Final answer
    x = 68,580.44

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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.