Home / 120,200.76-165,875.40-66,486.78

Finding the Fourth Proportional to 120,200.76, 165,875.40 and 66,486.78

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Solution

The fourth proportional to 120,200.76, 165,875.40 and 66,486.78 is: 91,750.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,200.76 : 165,875.40 = 66,486.78 : x
  2. Step 2: Convert to fraction form
    120,200.76/165,875.40 = 66,486.78/x
  3. Step 3: Cross multiply
    120,200.76x = 165,875.40 × 66,486.78
  4. Step 4: Simplify right side
    120,200.76x = 11,028,521,227.21
  5. Step 5: Solve for x
    x = 11,028,521,227.21/120,200.76
  6. Step 6: Final answer
    x = 91,750.84

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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.