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Finding the Fourth Proportional to 120,505, 180,820.53 and 87,497.71

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Solution

The fourth proportional to 120,505, 180,820.53 and 87,497.71 is: 131,292.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,505 : 180,820.53 = 87,497.71 : x
  2. Step 2: Convert to fraction form
    120,505/180,820.53 = 87,497.71/x
  3. Step 3: Cross multiply
    120,505x = 180,820.53 × 87,497.71
  4. Step 4: Simplify right side
    120,505x = 15,821,382,295.99
  5. Step 5: Solve for x
    x = 15,821,382,295.99/120,505
  6. Step 6: Final answer
    x = 131,292.33

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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.