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Finding the Fourth Proportional to 43,905, 65,774.88 and 21,692.40

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Solution

The fourth proportional to 43,905, 65,774.88 and 21,692.40 is: 32,497.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,905 : 65,774.88 = 21,692.40 : x
  2. Step 2: Convert to fraction form
    43,905/65,774.88 = 21,692.40/x
  3. Step 3: Cross multiply
    43,905x = 65,774.88 × 21,692.40
  4. Step 4: Simplify right side
    43,905x = 1,426,815,006.91
  5. Step 5: Solve for x
    x = 1,426,815,006.91/43,905
  6. Step 6: Final answer
    x = 32,497.78

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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.