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Finding the Fourth Proportional to 172,364.55, 258,546.83 and 128,077.80

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Solution

The fourth proportional to 172,364.55, 258,546.83 and 128,077.80 is: 192,116.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,364.55 : 258,546.83 = 128,077.80 : x
  2. Step 2: Convert to fraction form
    172,364.55/258,546.83 = 128,077.80/x
  3. Step 3: Cross multiply
    172,364.55x = 258,546.83 × 128,077.80
  4. Step 4: Simplify right side
    172,364.55x = 33,114,108,542.99
  5. Step 5: Solve for x
    x = 33,114,108,542.99/172,364.55
  6. Step 6: Final answer
    x = 192,116.70

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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.