Home / 85,947.86-128,923.49-29,789.80

Finding the Fourth Proportional to 85,947.86, 128,923.49 and 29,789.80

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Solution

The fourth proportional to 85,947.86, 128,923.49 and 29,789.80 is: 44,685.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,947.86 : 128,923.49 = 29,789.80 : x
  2. Step 2: Convert to fraction form
    85,947.86/128,923.49 = 29,789.80/x
  3. Step 3: Cross multiply
    85,947.86x = 128,923.49 × 29,789.80
  4. Step 4: Simplify right side
    85,947.86x = 3,840,604,734.57
  5. Step 5: Solve for x
    x = 3,840,604,734.57/85,947.86
  6. Step 6: Final answer
    x = 44,685.29

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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.