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Finding the Fourth Proportional to 105,186.58, 145,169.90 and 59,247.72

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Solution

The fourth proportional to 105,186.58, 145,169.90 and 59,247.72 is: 81,768.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,186.58 : 145,169.90 = 59,247.72 : x
  2. Step 2: Convert to fraction form
    105,186.58/145,169.90 = 59,247.72/x
  3. Step 3: Cross multiply
    105,186.58x = 145,169.90 × 59,247.72
  4. Step 4: Simplify right side
    105,186.58x = 8,600,985,654.31
  5. Step 5: Solve for x
    x = 8,600,985,654.31/105,186.58
  6. Step 6: Final answer
    x = 81,768.85

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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.