Home / 85,758.92-128,638.67-21,717.03

Finding the Fourth Proportional to 85,758.92, 128,638.67 and 21,717.03

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Solution

The fourth proportional to 85,758.92, 128,638.67 and 21,717.03 is: 32,575.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,758.92 : 128,638.67 = 21,717.03 : x
  2. Step 2: Convert to fraction form
    85,758.92/128,638.67 = 21,717.03/x
  3. Step 3: Cross multiply
    85,758.92x = 128,638.67 × 21,717.03
  4. Step 4: Simplify right side
    85,758.92x = 2,793,650,072.24
  5. Step 5: Solve for x
    x = 2,793,650,072.24/85,758.92
  6. Step 6: Final answer
    x = 32,575.62

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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.