Home / 85,991.08-128,927.73-43,789.47

Finding the Fourth Proportional to 85,991.08, 128,927.73 and 43,789.47

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Solution

The fourth proportional to 85,991.08, 128,927.73 and 43,789.47 is: 65,654.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,991.08 : 128,927.73 = 43,789.47 : x
  2. Step 2: Convert to fraction form
    85,991.08/128,927.73 = 43,789.47/x
  3. Step 3: Cross multiply
    85,991.08x = 128,927.73 × 43,789.47
  4. Step 4: Simplify right side
    85,991.08x = 5,645,676,320.36
  5. Step 5: Solve for x
    x = 5,645,676,320.36/85,991.08
  6. Step 6: Final answer
    x = 65,654.21

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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.