Home / 120,765.20-180,564.60-89,272.40

Finding the Fourth Proportional to 120,765.20, 180,564.60 and 89,272.40

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Solution

The fourth proportional to 120,765.20, 180,564.60 and 89,272.40 is: 133,477.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,765.20 : 180,564.60 = 89,272.40 : x
  2. Step 2: Convert to fraction form
    120,765.20/180,564.60 = 89,272.40/x
  3. Step 3: Cross multiply
    120,765.20x = 180,564.60 × 89,272.40
  4. Step 4: Simplify right side
    120,765.20x = 16,119,435,197.04
  5. Step 5: Solve for x
    x = 16,119,435,197.04/120,765.20
  6. Step 6: Final answer
    x = 133,477.49

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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.