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Finding the Fourth Proportional to 85,403.48, 128,101.37 and 29,248.61

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Solution

The fourth proportional to 85,403.48, 128,101.37 and 29,248.61 is: 43,871.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,403.48 : 128,101.37 = 29,248.61 : x
  2. Step 2: Convert to fraction form
    85,403.48/128,101.37 = 29,248.61/x
  3. Step 3: Cross multiply
    85,403.48x = 128,101.37 × 29,248.61
  4. Step 4: Simplify right side
    85,403.48x = 3,746,786,224.85
  5. Step 5: Solve for x
    x = 3,746,786,224.85/85,403.48
  6. Step 6: Final answer
    x = 43,871.59

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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.