Home / 85,789.65-128,701.49-26,622.80

Finding the Fourth Proportional to 85,789.65, 128,701.49 and 26,622.80

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Solution

The fourth proportional to 85,789.65, 128,701.49 and 26,622.80 is: 39,939.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,789.65 : 128,701.49 = 26,622.80 : x
  2. Step 2: Convert to fraction form
    85,789.65/128,701.49 = 26,622.80/x
  3. Step 3: Cross multiply
    85,789.65x = 128,701.49 × 26,622.80
  4. Step 4: Simplify right side
    85,789.65x = 3,426,393,251.35
  5. Step 5: Solve for x
    x = 3,426,393,251.35/85,789.65
  6. Step 6: Final answer
    x = 39,939.47

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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.