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Finding the Fourth Proportional to 172,419.66, 258,600.06 and 47,731.50

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Solution

The fourth proportional to 172,419.66, 258,600.06 and 47,731.50 is: 71,589.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,419.66 : 258,600.06 = 47,731.50 : x
  2. Step 2: Convert to fraction form
    172,419.66/258,600.06 = 47,731.50/x
  3. Step 3: Cross multiply
    172,419.66x = 258,600.06 × 47,731.50
  4. Step 4: Simplify right side
    172,419.66x = 12,343,368,763.89
  5. Step 5: Solve for x
    x = 12,343,368,763.89/172,419.66
  6. Step 6: Final answer
    x = 71,589.10

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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.