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Finding the Fourth Proportional to 120,210.99, 165,891.15 and 65,763.60

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Solution

The fourth proportional to 120,210.99, 165,891.15 and 65,763.60 is: 90,753.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,210.99 : 165,891.15 = 65,763.60 : x
  2. Step 2: Convert to fraction form
    120,210.99/165,891.15 = 65,763.60/x
  3. Step 3: Cross multiply
    120,210.99x = 165,891.15 × 65,763.60
  4. Step 4: Simplify right side
    120,210.99x = 10,909,599,232.14
  5. Step 5: Solve for x
    x = 10,909,599,232.14/120,210.99
  6. Step 6: Final answer
    x = 90,753.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.