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Finding the Fourth Proportional to 86,457.78, 118,360.85 and 85,874.58

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Solution

The fourth proportional to 86,457.78, 118,360.85 and 85,874.58 is: 117,562.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,457.78 : 118,360.85 = 85,874.58 : x
  2. Step 2: Convert to fraction form
    86,457.78/118,360.85 = 85,874.58/x
  3. Step 3: Cross multiply
    86,457.78x = 118,360.85 × 85,874.58
  4. Step 4: Simplify right side
    86,457.78x = 10,164,187,852.82
  5. Step 5: Solve for x
    x = 10,164,187,852.82/86,457.78
  6. Step 6: Final answer
    x = 117,562.44

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.