Home / 120,802.20-180,620.10-89,309.40

Finding the Fourth Proportional to 120,802.20, 180,620.10 and 89,309.40

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Solution

The fourth proportional to 120,802.20, 180,620.10 and 89,309.40 is: 133,532.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,802.20 : 180,620.10 = 89,309.40 : x
  2. Step 2: Convert to fraction form
    120,802.20/180,620.10 = 89,309.40/x
  3. Step 3: Cross multiply
    120,802.20x = 180,620.10 × 89,309.40
  4. Step 4: Simplify right side
    120,802.20x = 16,131,072,758.94
  5. Step 5: Solve for x
    x = 16,131,072,758.94/120,802.20
  6. Step 6: Final answer
    x = 133,532.94

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1.5x scale

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.