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Finding the Fourth Proportional to 172,605.88, 258,919.98 and 54,281.80

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Solution

The fourth proportional to 172,605.88, 258,919.98 and 54,281.80 is: 81,426.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,605.88 : 258,919.98 = 54,281.80 : x
  2. Step 2: Convert to fraction form
    172,605.88/258,919.98 = 54,281.80/x
  3. Step 3: Cross multiply
    172,605.88x = 258,919.98 × 54,281.80
  4. Step 4: Simplify right side
    172,605.88x = 14,054,642,570.36
  5. Step 5: Solve for x
    x = 14,054,642,570.36/172,605.88
  6. Step 6: Final answer
    x = 81,426.21

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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.