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Finding the Fourth Proportional to 172,488.66, 258,645.51 and 78,914.22

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Solution

The fourth proportional to 172,488.66, 258,645.51 and 78,914.22 is: 118,331.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,488.66 : 258,645.51 = 78,914.22 : x
  2. Step 2: Convert to fraction form
    172,488.66/258,645.51 = 78,914.22/x
  3. Step 3: Cross multiply
    172,488.66x = 258,645.51 × 78,914.22
  4. Step 4: Simplify right side
    172,488.66x = 20,410,808,678.15
  5. Step 5: Solve for x
    x = 20,410,808,678.15/172,488.66
  6. Step 6: Final answer
    x = 118,331.31

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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.