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Finding the Fourth Proportional to 99,208.65, 136,905.96 and 56,187.44

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Solution

The fourth proportional to 99,208.65, 136,905.96 and 56,187.44 is: 77,537.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,208.65 : 136,905.96 = 56,187.44 : x
  2. Step 2: Convert to fraction form
    99,208.65/136,905.96 = 56,187.44/x
  3. Step 3: Cross multiply
    99,208.65x = 136,905.96 × 56,187.44
  4. Step 4: Simplify right side
    99,208.65x = 7,692,394,728.61
  5. Step 5: Solve for x
    x = 7,692,394,728.61/99,208.65
  6. Step 6: Final answer
    x = 77,537.54

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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.