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Finding the Fourth Proportional to 172,355.40, 258,533.10 and 132,989.40

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Solution

The fourth proportional to 172,355.40, 258,533.10 and 132,989.40 is: 199,484.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,355.40 : 258,533.10 = 132,989.40 : x
  2. Step 2: Convert to fraction form
    172,355.40/258,533.10 = 132,989.40/x
  3. Step 3: Cross multiply
    172,355.40x = 258,533.10 × 132,989.40
  4. Step 4: Simplify right side
    172,355.40x = 34,382,161,849.14
  5. Step 5: Solve for x
    x = 34,382,161,849.14/172,355.40
  6. Step 6: Final answer
    x = 199,484.10

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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.