Home / 89,026.60-133,539.90-80,278.60

Finding the Fourth Proportional to 89,026.60, 133,539.90 and 80,278.60

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Solution

The fourth proportional to 89,026.60, 133,539.90 and 80,278.60 is: 120,417.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,026.60 : 133,539.90 = 80,278.60 : x
  2. Step 2: Convert to fraction form
    89,026.60/133,539.90 = 80,278.60/x
  3. Step 3: Cross multiply
    89,026.60x = 133,539.90 × 80,278.60
  4. Step 4: Simplify right side
    89,026.60x = 10,720,396,216.14
  5. Step 5: Solve for x
    x = 10,720,396,216.14/89,026.60
  6. Step 6: Final answer
    x = 120,417.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.