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Finding the Fourth Proportional to 74,630.94, 102,987.25 and 40,639.29

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Solution

The fourth proportional to 74,630.94, 102,987.25 and 40,639.29 is: 56,080.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,630.94 : 102,987.25 = 40,639.29 : x
  2. Step 2: Convert to fraction form
    74,630.94/102,987.25 = 40,639.29/x
  3. Step 3: Cross multiply
    74,630.94x = 102,987.25 × 40,639.29
  4. Step 4: Simplify right side
    74,630.94x = 4,185,328,719.05
  5. Step 5: Solve for x
    x = 4,185,328,719.05/74,630.94
  6. Step 6: Final answer
    x = 56,080.34

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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.