Home / 74,628.65-102,987.38-40,636.61

Finding the Fourth Proportional to 74,628.65, 102,987.38 and 40,636.61

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Solution

The fourth proportional to 74,628.65, 102,987.38 and 40,636.61 is: 56,078.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,628.65 : 102,987.38 = 40,636.61 : x
  2. Step 2: Convert to fraction form
    74,628.65/102,987.38 = 40,636.61/x
  3. Step 3: Cross multiply
    74,628.65x = 102,987.38 × 40,636.61
  4. Step 4: Simplify right side
    74,628.65x = 4,185,057,792.80
  5. Step 5: Solve for x
    x = 4,185,057,792.80/74,628.65
  6. Step 6: Final answer
    x = 56,078.43

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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.