Home / 85,283.46-127,758.96-51,920.78

Finding the Fourth Proportional to 85,283.46, 127,758.96 and 51,920.78

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Solution

The fourth proportional to 85,283.46, 127,758.96 and 51,920.78 is: 77,779.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,283.46 : 127,758.96 = 51,920.78 : x
  2. Step 2: Convert to fraction form
    85,283.46/127,758.96 = 51,920.78/x
  3. Step 3: Cross multiply
    85,283.46x = 127,758.96 × 51,920.78
  4. Step 4: Simplify right side
    85,283.46x = 6,633,344,855.19
  5. Step 5: Solve for x
    x = 6,633,344,855.19/85,283.46
  6. Step 6: Final answer
    x = 77,779.97

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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.