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Finding the Fourth Proportional to 172,422.12, 258,441.42 and 72,552.84

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Solution

The fourth proportional to 172,422.12, 258,441.42 and 72,552.84 is: 108,748.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,422.12 : 258,441.42 = 72,552.84 : x
  2. Step 2: Convert to fraction form
    172,422.12/258,441.42 = 72,552.84/x
  3. Step 3: Cross multiply
    172,422.12x = 258,441.42 × 72,552.84
  4. Step 4: Simplify right side
    172,422.12x = 18,750,658,994.63
  5. Step 5: Solve for x
    x = 18,750,658,994.63/172,422.12
  6. Step 6: Final answer
    x = 108,748.57

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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.