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Finding the Fourth Proportional to 74,630.54, 102,992.69 and 40,639.61

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Solution

The fourth proportional to 74,630.54, 102,992.69 and 40,639.61 is: 56,084.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,630.54 : 102,992.69 = 40,639.61 : x
  2. Step 2: Convert to fraction form
    74,630.54/102,992.69 = 40,639.61/x
  3. Step 3: Cross multiply
    74,630.54x = 102,992.69 × 40,639.61
  4. Step 4: Simplify right side
    74,630.54x = 4,185,582,036.29
  5. Step 5: Solve for x
    x = 4,185,582,036.29/74,630.54
  6. Step 6: Final answer
    x = 56,084.04

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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.