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Finding the Fourth Proportional to 128,751.89, 193,090.92 and 38,803.31

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Solution

The fourth proportional to 128,751.89, 193,090.92 and 38,803.31 is: 58,193.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,751.89 : 193,090.92 = 38,803.31 : x
  2. Step 2: Convert to fraction form
    128,751.89/193,090.92 = 38,803.31/x
  3. Step 3: Cross multiply
    128,751.89x = 193,090.92 × 38,803.31
  4. Step 4: Simplify right side
    128,751.89x = 7,492,567,309.67
  5. Step 5: Solve for x
    x = 7,492,567,309.67/128,751.89
  6. Step 6: Final answer
    x = 58,193.85

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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.