Home / 74,630.40-102,989.78-40,638.36

Finding the Fourth Proportional to 74,630.40, 102,989.78 and 40,638.36

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Solution

The fourth proportional to 74,630.40, 102,989.78 and 40,638.36 is: 56,080.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,630.40 : 102,989.78 = 40,638.36 : x
  2. Step 2: Convert to fraction form
    74,630.40/102,989.78 = 40,638.36/x
  3. Step 3: Cross multiply
    74,630.40x = 102,989.78 × 40,638.36
  4. Step 4: Simplify right side
    74,630.40x = 4,185,335,755.96
  5. Step 5: Solve for x
    x = 4,185,335,755.96/74,630.40
  6. Step 6: Final answer
    x = 56,080.84

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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.