Home / 85,852.70-128,779.05-82,572.20

Finding the Fourth Proportional to 85,852.70, 128,779.05 and 82,572.20

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Solution

The fourth proportional to 85,852.70, 128,779.05 and 82,572.20 is: 123,858.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,852.70 : 128,779.05 = 82,572.20 : x
  2. Step 2: Convert to fraction form
    85,852.70/128,779.05 = 82,572.20/x
  3. Step 3: Cross multiply
    85,852.70x = 128,779.05 × 82,572.20
  4. Step 4: Simplify right side
    85,852.70x = 10,633,569,472.41
  5. Step 5: Solve for x
    x = 10,633,569,472.41/85,852.70
  6. Step 6: Final answer
    x = 123,858.30

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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.