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Finding the Fourth Proportional to 68,717.80, 94,830.18 and 38,907.88

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Solution

The fourth proportional to 68,717.80, 94,830.18 and 38,907.88 is: 53,692.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,717.80 : 94,830.18 = 38,907.88 : x
  2. Step 2: Convert to fraction form
    68,717.80/94,830.18 = 38,907.88/x
  3. Step 3: Cross multiply
    68,717.80x = 94,830.18 × 38,907.88
  4. Step 4: Simplify right side
    68,717.80x = 3,689,641,263.82
  5. Step 5: Solve for x
    x = 3,689,641,263.82/68,717.80
  6. Step 6: Final answer
    x = 53,692.66

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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.