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Finding the Fourth Proportional to 172,486.66, 258,642.51 and 78,912.22

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Solution

The fourth proportional to 172,486.66, 258,642.51 and 78,912.22 is: 118,328.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,486.66 : 258,642.51 = 78,912.22 : x
  2. Step 2: Convert to fraction form
    172,486.66/258,642.51 = 78,912.22/x
  3. Step 3: Cross multiply
    172,486.66x = 258,642.51 × 78,912.22
  4. Step 4: Simplify right side
    172,486.66x = 20,410,054,650.47
  5. Step 5: Solve for x
    x = 20,410,054,650.47/172,486.66
  6. Step 6: Final answer
    x = 118,328.31

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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.