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Finding the Fourth Proportional to 172,505.46, 258,736.32 and 128,196.84

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Solution

The fourth proportional to 172,505.46, 258,736.32 and 128,196.84 is: 192,279.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,505.46 : 258,736.32 = 128,196.84 : x
  2. Step 2: Convert to fraction form
    172,505.46/258,736.32 = 128,196.84/x
  3. Step 3: Cross multiply
    172,505.46x = 258,736.32 × 128,196.84
  4. Step 4: Simplify right side
    172,505.46x = 33,169,178,617.23
  5. Step 5: Solve for x
    x = 33,169,178,617.23/172,505.46
  6. Step 6: Final answer
    x = 192,279.01

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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.