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Finding the Fourth Proportional to 172,223.87, 258,278.28 and 72,365.45

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Solution

The fourth proportional to 172,223.87, 258,278.28 and 72,365.45 is: 108,524.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,223.87 : 258,278.28 = 72,365.45 : x
  2. Step 2: Convert to fraction form
    172,223.87/258,278.28 = 72,365.45/x
  3. Step 3: Cross multiply
    172,223.87x = 258,278.28 × 72,365.45
  4. Step 4: Simplify right side
    172,223.87x = 18,690,422,666.03
  5. Step 5: Solve for x
    x = 18,690,422,666.03/172,223.87
  6. Step 6: Final answer
    x = 108,524.00

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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.