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Finding the Fourth Proportional to 74,368.60, 102,628.09 and 40,376.41

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Solution

The fourth proportional to 74,368.60, 102,628.09 and 40,376.41 is: 55,719.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,368.60 : 102,628.09 = 40,376.41 : x
  2. Step 2: Convert to fraction form
    74,368.60/102,628.09 = 40,376.41/x
  3. Step 3: Cross multiply
    74,368.60x = 102,628.09 × 40,376.41
  4. Step 4: Simplify right side
    74,368.60x = 4,143,753,839.36
  5. Step 5: Solve for x
    x = 4,143,753,839.36/74,368.60
  6. Step 6: Final answer
    x = 55,719.13

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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.