Home / 85,340.67-128,011.07-29,181.21

Finding the Fourth Proportional to 85,340.67, 128,011.07 and 29,181.21

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Solution

The fourth proportional to 85,340.67, 128,011.07 and 29,181.21 is: 43,771.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,340.67 : 128,011.07 = 29,181.21 : x
  2. Step 2: Convert to fraction form
    85,340.67/128,011.07 = 29,181.21/x
  3. Step 3: Cross multiply
    85,340.67x = 128,011.07 × 29,181.21
  4. Step 4: Simplify right side
    85,340.67x = 3,735,517,275.94
  5. Step 5: Solve for x
    x = 3,735,517,275.94/85,340.67
  6. Step 6: Final answer
    x = 43,771.83

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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.