Home / 120,021.12-165,632.49-66,309.60

Finding the Fourth Proportional to 120,021.12, 165,632.49 and 66,309.60

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Solution

The fourth proportional to 120,021.12, 165,632.49 and 66,309.60 is: 91,509.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,021.12 : 165,632.49 = 66,309.60 : x
  2. Step 2: Convert to fraction form
    120,021.12/165,632.49 = 66,309.60/x
  3. Step 3: Cross multiply
    120,021.12x = 165,632.49 × 66,309.60
  4. Step 4: Simplify right side
    120,021.12x = 10,983,024,158.90
  5. Step 5: Solve for x
    x = 10,983,024,158.90/120,021.12
  6. Step 6: Final answer
    x = 91,509.10

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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.