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Finding the Fourth Proportional to 85,798.30, 128,714.64 and 29,640.46

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Solution

The fourth proportional to 85,798.30, 128,714.64 and 29,640.46 is: 44,466.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,798.30 : 128,714.64 = 29,640.46 : x
  2. Step 2: Convert to fraction form
    85,798.30/128,714.64 = 29,640.46/x
  3. Step 3: Cross multiply
    85,798.30x = 128,714.64 × 29,640.46
  4. Step 4: Simplify right side
    85,798.30x = 3,815,161,138.33
  5. Step 5: Solve for x
    x = 3,815,161,138.33/85,798.30
  6. Step 6: Final answer
    x = 44,466.63

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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.