Home / 85,881.24-128,759.58-57,731.47

Finding the Fourth Proportional to 85,881.24, 128,759.58 and 57,731.47

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Solution

The fourth proportional to 85,881.24, 128,759.58 and 57,731.47 is: 86,555.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,881.24 : 128,759.58 = 57,731.47 : x
  2. Step 2: Convert to fraction form
    85,881.24/128,759.58 = 57,731.47/x
  3. Step 3: Cross multiply
    85,881.24x = 128,759.58 × 57,731.47
  4. Step 4: Simplify right side
    85,881.24x = 7,433,479,508.08
  5. Step 5: Solve for x
    x = 7,433,479,508.08/85,881.24
  6. Step 6: Final answer
    x = 86,555.34

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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.