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Finding the Fourth Proportional to 172,907.68, 238,692.28 and 121,961.92

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Solution

The fourth proportional to 172,907.68, 238,692.28 and 121,961.92 is: 168,363.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,907.68 : 238,692.28 = 121,961.92 : x
  2. Step 2: Convert to fraction form
    172,907.68/238,692.28 = 121,961.92/x
  3. Step 3: Cross multiply
    172,907.68x = 238,692.28 × 121,961.92
  4. Step 4: Simplify right side
    172,907.68x = 29,111,368,757.98
  5. Step 5: Solve for x
    x = 29,111,368,757.98/172,907.68
  6. Step 6: Final answer
    x = 168,363.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.