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Finding the Fourth Proportional to 74,857.44, 103,320.64 and 49,368.42

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Solution

The fourth proportional to 74,857.44, 103,320.64 and 49,368.42 is: 68,139.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,857.44 : 103,320.64 = 49,368.42 : x
  2. Step 2: Convert to fraction form
    74,857.44/103,320.64 = 49,368.42/x
  3. Step 3: Cross multiply
    74,857.44x = 103,320.64 × 49,368.42
  4. Step 4: Simplify right side
    74,857.44x = 5,100,776,750.19
  5. Step 5: Solve for x
    x = 5,100,776,750.19/74,857.44
  6. Step 6: Final answer
    x = 68,139.88

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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.