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Finding the Fourth Proportional to 172,110.51, 258,157.55 and 65,518.97

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Solution

The fourth proportional to 172,110.51, 258,157.55 and 65,518.97 is: 98,275.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,110.51 : 258,157.55 = 65,518.97 : x
  2. Step 2: Convert to fraction form
    172,110.51/258,157.55 = 65,518.97/x
  3. Step 3: Cross multiply
    172,110.51x = 258,157.55 × 65,518.97
  4. Step 4: Simplify right side
    172,110.51x = 16,914,215,155.34
  5. Step 5: Solve for x
    x = 16,914,215,155.34/172,110.51
  6. Step 6: Final answer
    x = 98,275.32

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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.