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Finding the Fourth Proportional to 74,680, 103,058.72 and 41,145.28

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Solution

The fourth proportional to 74,680, 103,058.72 and 41,145.28 is: 56,780.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,680 : 103,058.72 = 41,145.28 : x
  2. Step 2: Convert to fraction form
    74,680/103,058.72 = 41,145.28/x
  3. Step 3: Cross multiply
    74,680x = 103,058.72 × 41,145.28
  4. Step 4: Simplify right side
    74,680x = 4,240,379,890.84
  5. Step 5: Solve for x
    x = 4,240,379,890.84/74,680
  6. Step 6: Final answer
    x = 56,780.66

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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.