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Finding the Fourth Proportional to 81,767.81, 112,876.03 and 57,590.53

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Solution

The fourth proportional to 81,767.81, 112,876.03 and 57,590.53 is: 79,500.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,767.81 : 112,876.03 = 57,590.53 : x
  2. Step 2: Convert to fraction form
    81,767.81/112,876.03 = 57,590.53/x
  3. Step 3: Cross multiply
    81,767.81x = 112,876.03 × 57,590.53
  4. Step 4: Simplify right side
    81,767.81x = 6,500,590,181.79
  5. Step 5: Solve for x
    x = 6,500,590,181.79/81,767.81
  6. Step 6: Final answer
    x = 79,500.60

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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.