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Finding the Fourth Proportional to 172,143.85, 258,215.25 and 45,783.99

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Solution

The fourth proportional to 172,143.85, 258,215.25 and 45,783.99 is: 68,675.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,143.85 : 258,215.25 = 45,783.99 : x
  2. Step 2: Convert to fraction form
    172,143.85/258,215.25 = 45,783.99/x
  3. Step 3: Cross multiply
    172,143.85x = 258,215.25 × 45,783.99
  4. Step 4: Simplify right side
    172,143.85x = 11,822,124,423.85
  5. Step 5: Solve for x
    x = 11,822,124,423.85/172,143.85
  6. Step 6: Final answer
    x = 68,675.85

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1.5x scale

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.