Home / 85,644.33-128,429.24-40,678.71

Finding the Fourth Proportional to 85,644.33, 128,429.24 and 40,678.71

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Solution

The fourth proportional to 85,644.33, 128,429.24 and 40,678.71 is: 61,000.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,644.33 : 128,429.24 = 40,678.71 : x
  2. Step 2: Convert to fraction form
    85,644.33/128,429.24 = 40,678.71/x
  3. Step 3: Cross multiply
    85,644.33x = 128,429.24 × 40,678.71
  4. Step 4: Simplify right side
    85,644.33x = 5,224,335,606.09
  5. Step 5: Solve for x
    x = 5,224,335,606.09/85,644.33
  6. Step 6: Final answer
    x = 61,000.37

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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.