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Finding the Fourth Proportional to 74,959.38, 103,440.90 and 40,969

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Solution

The fourth proportional to 74,959.38, 103,440.90 and 40,969 is: 56,535.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,959.38 : 103,440.90 = 40,969 : x
  2. Step 2: Convert to fraction form
    74,959.38/103,440.90 = 40,969/x
  3. Step 3: Cross multiply
    74,959.38x = 103,440.90 × 40,969
  4. Step 4: Simplify right side
    74,959.38x = 4,237,870,232.10
  5. Step 5: Solve for x
    x = 4,237,870,232.10/74,959.38
  6. Step 6: Final answer
    x = 56,535.56

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1.5x scale

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.