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Finding the Fourth Proportional to 172,579, 258,868.50 and 47,920.12

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Solution

The fourth proportional to 172,579, 258,868.50 and 47,920.12 is: 71,880.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,579 : 258,868.50 = 47,920.12 : x
  2. Step 2: Convert to fraction form
    172,579/258,868.50 = 47,920.12/x
  3. Step 3: Cross multiply
    172,579x = 258,868.50 × 47,920.12
  4. Step 4: Simplify right side
    172,579x = 12,405,009,584.22
  5. Step 5: Solve for x
    x = 12,405,009,584.22/172,579
  6. Step 6: Final answer
    x = 71,880.18

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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.