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Finding the Fourth Proportional to 172,301.55, 258,346.49 and 66,997.77

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Solution

The fourth proportional to 172,301.55, 258,346.49 and 66,997.77 is: 100,455.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,301.55 : 258,346.49 = 66,997.77 : x
  2. Step 2: Convert to fraction form
    172,301.55/258,346.49 = 66,997.77/x
  3. Step 3: Cross multiply
    172,301.55x = 258,346.49 × 66,997.77
  4. Step 4: Simplify right side
    172,301.55x = 17,308,638,382.34
  5. Step 5: Solve for x
    x = 17,308,638,382.34/172,301.55
  6. Step 6: Final answer
    x = 100,455.50

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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.