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Finding the Fourth Proportional to 362,139.51, 543,220.68 and 172,620.47

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Solution

The fourth proportional to 362,139.51, 543,220.68 and 172,620.47 is: 258,936.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    362,139.51 : 543,220.68 = 172,620.47 : x
  2. Step 2: Convert to fraction form
    362,139.51/543,220.68 = 172,620.47/x
  3. Step 3: Cross multiply
    362,139.51x = 543,220.68 × 172,620.47
  4. Step 4: Simplify right side
    362,139.51x = 93,771,007,074.09
  5. Step 5: Solve for x
    x = 93,771,007,074.09/362,139.51
  6. Step 6: Final answer
    x = 258,936.14

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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.