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Finding the Fourth Proportional to 74,368.72, 102,628.26 and 40,376.54

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Solution

The fourth proportional to 74,368.72, 102,628.26 and 40,376.54 is: 55,719.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,368.72 : 102,628.26 = 40,376.54 : x
  2. Step 2: Convert to fraction form
    74,368.72/102,628.26 = 40,376.54/x
  3. Step 3: Cross multiply
    74,368.72x = 102,628.26 × 40,376.54
  4. Step 4: Simplify right side
    74,368.72x = 4,143,773,430.94
  5. Step 5: Solve for x
    x = 4,143,773,430.94/74,368.72
  6. Step 6: Final answer
    x = 55,719.31

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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.