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Finding the Fourth Proportional to 172,238.54, 258,388.79 and 70,980.21

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Solution

The fourth proportional to 172,238.54, 258,388.79 and 70,980.21 is: 106,483.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,238.54 : 258,388.79 = 70,980.21 : x
  2. Step 2: Convert to fraction form
    172,238.54/258,388.79 = 70,980.21/x
  3. Step 3: Cross multiply
    172,238.54x = 258,388.79 × 70,980.21
  4. Step 4: Simplify right side
    172,238.54x = 18,340,490,220.94
  5. Step 5: Solve for x
    x = 18,340,490,220.94/172,238.54
  6. Step 6: Final answer
    x = 106,483.08

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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.