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Finding the Fourth Proportional to 170,779.70, 256,169.55 and 82,011.80

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Solution

The fourth proportional to 170,779.70, 256,169.55 and 82,011.80 is: 123,017.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,779.70 : 256,169.55 = 82,011.80 : x
  2. Step 2: Convert to fraction form
    170,779.70/256,169.55 = 82,011.80/x
  3. Step 3: Cross multiply
    170,779.70x = 256,169.55 × 82,011.80
  4. Step 4: Simplify right side
    170,779.70x = 21,008,925,900.69
  5. Step 5: Solve for x
    x = 21,008,925,900.69/170,779.70
  6. Step 6: Final answer
    x = 123,017.70

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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.