Home / 74,631.64-102,990.19-40,640.53

Finding the Fourth Proportional to 74,631.64, 102,990.19 and 40,640.53

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Solution

The fourth proportional to 74,631.64, 102,990.19 and 40,640.53 is: 56,083.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,631.64 : 102,990.19 = 40,640.53 : x
  2. Step 2: Convert to fraction form
    74,631.64/102,990.19 = 40,640.53/x
  3. Step 3: Cross multiply
    74,631.64x = 102,990.19 × 40,640.53
  4. Step 4: Simplify right side
    74,631.64x = 4,185,575,906.40
  5. Step 5: Solve for x
    x = 4,185,575,906.40/74,631.64
  6. Step 6: Final answer
    x = 56,083.13

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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.