Home / 120,019.36-165,636.40-66,309.06

Finding the Fourth Proportional to 120,019.36, 165,636.40 and 66,309.06

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Solution

The fourth proportional to 120,019.36, 165,636.40 and 66,309.06 is: 91,511.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,019.36 : 165,636.40 = 66,309.06 : x
  2. Step 2: Convert to fraction form
    120,019.36/165,636.40 = 66,309.06/x
  3. Step 3: Cross multiply
    120,019.36x = 165,636.40 × 66,309.06
  4. Step 4: Simplify right side
    120,019.36x = 10,983,193,985.78
  5. Step 5: Solve for x
    x = 10,983,193,985.78/120,019.36
  6. Step 6: Final answer
    x = 91,511.85

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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.