Home / 120,029.20-165,642.03-66,315.45

Finding the Fourth Proportional to 120,029.20, 165,642.03 and 66,315.45

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Solution

The fourth proportional to 120,029.20, 165,642.03 and 66,315.45 is: 91,516.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,029.20 : 165,642.03 = 66,315.45 : x
  2. Step 2: Convert to fraction form
    120,029.20/165,642.03 = 66,315.45/x
  3. Step 3: Cross multiply
    120,029.20x = 165,642.03 × 66,315.45
  4. Step 4: Simplify right side
    120,029.20x = 10,984,625,758.36
  5. Step 5: Solve for x
    x = 10,984,625,758.36/120,029.20
  6. Step 6: Final answer
    x = 91,516.28

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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.