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Finding the Fourth Proportional to 74,871.89, 103,322.43 and 40,880.28

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Solution

The fourth proportional to 74,871.89, 103,322.43 and 40,880.28 is: 56,414.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,871.89 : 103,322.43 = 40,880.28 : x
  2. Step 2: Convert to fraction form
    74,871.89/103,322.43 = 40,880.28/x
  3. Step 3: Cross multiply
    74,871.89x = 103,322.43 × 40,880.28
  4. Step 4: Simplify right side
    74,871.89x = 4,223,849,557.87
  5. Step 5: Solve for x
    x = 4,223,849,557.87/74,871.89
  6. Step 6: Final answer
    x = 56,414.35

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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.