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Finding the Fourth Proportional to 103,920.74, 155,491.84 and 74,004.10

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Solution

The fourth proportional to 103,920.74, 155,491.84 and 74,004.10 is: 110,728.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,920.74 : 155,491.84 = 74,004.10 : x
  2. Step 2: Convert to fraction form
    103,920.74/155,491.84 = 74,004.10/x
  3. Step 3: Cross multiply
    103,920.74x = 155,491.84 × 74,004.10
  4. Step 4: Simplify right side
    103,920.74x = 11,507,032,964.05
  5. Step 5: Solve for x
    x = 11,507,032,964.05/103,920.74
  6. Step 6: Final answer
    x = 110,728.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.