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Finding the Fourth Proportional to 172,245.76, 258,486.72 and 67,065.28

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Solution

The fourth proportional to 172,245.76, 258,486.72 and 67,065.28 is: 100,643.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,245.76 : 258,486.72 = 67,065.28 : x
  2. Step 2: Convert to fraction form
    172,245.76/258,486.72 = 67,065.28/x
  3. Step 3: Cross multiply
    172,245.76x = 258,486.72 × 67,065.28
  4. Step 4: Simplify right side
    172,245.76x = 17,335,484,253.08
  5. Step 5: Solve for x
    x = 17,335,484,253.08/172,245.76
  6. Step 6: Final answer
    x = 100,643.90

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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.