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Finding the Fourth Proportional to 172,040.40, 258,060.60 and 47,381.40

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Solution

The fourth proportional to 172,040.40, 258,060.60 and 47,381.40 is: 71,072.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,040.40 : 258,060.60 = 47,381.40 : x
  2. Step 2: Convert to fraction form
    172,040.40/258,060.60 = 47,381.40/x
  3. Step 3: Cross multiply
    172,040.40x = 258,060.60 × 47,381.40
  4. Step 4: Simplify right side
    172,040.40x = 12,227,272,512.84
  5. Step 5: Solve for x
    x = 12,227,272,512.84/172,040.40
  6. Step 6: Final answer
    x = 71,072.10

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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.