Home / 120,619.40-180,929.10-89,126.60

Finding the Fourth Proportional to 120,619.40, 180,929.10 and 89,126.60

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Solution

The fourth proportional to 120,619.40, 180,929.10 and 89,126.60 is: 133,689.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,619.40 : 180,929.10 = 89,126.60 : x
  2. Step 2: Convert to fraction form
    120,619.40/180,929.10 = 89,126.60/x
  3. Step 3: Cross multiply
    120,619.40x = 180,929.10 × 89,126.60
  4. Step 4: Simplify right side
    120,619.40x = 16,125,595,524.06
  5. Step 5: Solve for x
    x = 16,125,595,524.06/120,619.40
  6. Step 6: Final answer
    x = 133,689.90

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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.