Home / 85,979.21-128,848.68-73,262.54

Finding the Fourth Proportional to 85,979.21, 128,848.68 and 73,262.54

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Solution

The fourth proportional to 85,979.21, 128,848.68 and 73,262.54 is: 109,791.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,979.21 : 128,848.68 = 73,262.54 : x
  2. Step 2: Convert to fraction form
    85,979.21/128,848.68 = 73,262.54/x
  3. Step 3: Cross multiply
    85,979.21x = 128,848.68 × 73,262.54
  4. Step 4: Simplify right side
    85,979.21x = 9,439,781,572.45
  5. Step 5: Solve for x
    x = 9,439,781,572.45/85,979.21
  6. Step 6: Final answer
    x = 109,791.44

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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.