Home / 120,138.57-165,783.09-66,416.34

Finding the Fourth Proportional to 120,138.57, 165,783.09 and 66,416.34

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Solution

The fourth proportional to 120,138.57, 165,783.09 and 66,416.34 is: 91,650.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,138.57 : 165,783.09 = 66,416.34 : x
  2. Step 2: Convert to fraction form
    120,138.57/165,783.09 = 66,416.34/x
  3. Step 3: Cross multiply
    120,138.57x = 165,783.09 × 66,416.34
  4. Step 4: Simplify right side
    120,138.57x = 11,010,706,071.69
  5. Step 5: Solve for x
    x = 11,010,706,071.69/120,138.57
  6. Step 6: Final answer
    x = 91,650.05

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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.