Home / 90,856.82-136,285.75-80,907.68

Finding the Fourth Proportional to 90,856.82, 136,285.75 and 80,907.68

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Solution

The fourth proportional to 90,856.82, 136,285.75 and 80,907.68 is: 121,361.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,856.82 : 136,285.75 = 80,907.68 : x
  2. Step 2: Convert to fraction form
    90,856.82/136,285.75 = 80,907.68/x
  3. Step 3: Cross multiply
    90,856.82x = 136,285.75 × 80,907.68
  4. Step 4: Simplify right side
    90,856.82x = 11,026,563,988.01
  5. Step 5: Solve for x
    x = 11,026,563,988.01/90,856.82
  6. Step 6: Final answer
    x = 121,361.98

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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.