Home / 120,021.42-165,630.78-83,775.54

Finding the Fourth Proportional to 120,021.42, 165,630.78 and 83,775.54

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Solution

The fourth proportional to 120,021.42, 165,630.78 and 83,775.54 is: 115,611.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,021.42 : 165,630.78 = 83,775.54 : x
  2. Step 2: Convert to fraction form
    120,021.42/165,630.78 = 83,775.54/x
  3. Step 3: Cross multiply
    120,021.42x = 165,630.78 × 83,775.54
  4. Step 4: Simplify right side
    120,021.42x = 13,875,808,035.12
  5. Step 5: Solve for x
    x = 13,875,808,035.12/120,021.42
  6. Step 6: Final answer
    x = 115,611.10

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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.