Home / 81,579.08-112,369.38-57,664.64

Finding the Fourth Proportional to 81,579.08, 112,369.38 and 57,664.64

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Solution

The fourth proportional to 81,579.08, 112,369.38 and 57,664.64 is: 79,428.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,579.08 : 112,369.38 = 57,664.64 : x
  2. Step 2: Convert to fraction form
    81,579.08/112,369.38 = 57,664.64/x
  3. Step 3: Cross multiply
    81,579.08x = 112,369.38 × 57,664.64
  4. Step 4: Simplify right side
    81,579.08x = 6,479,739,909.40
  5. Step 5: Solve for x
    x = 6,479,739,909.40/81,579.08
  6. Step 6: Final answer
    x = 79,428.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.