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Finding the Fourth Proportional to 74,864.93, 103,355.64 and 51,928.16

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Solution

The fourth proportional to 74,864.93, 103,355.64 and 51,928.16 is: 71,690.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,864.93 : 103,355.64 = 51,928.16 : x
  2. Step 2: Convert to fraction form
    74,864.93/103,355.64 = 51,928.16/x
  3. Step 3: Cross multiply
    74,864.93x = 103,355.64 × 51,928.16
  4. Step 4: Simplify right side
    74,864.93x = 5,367,067,694.04
  5. Step 5: Solve for x
    x = 5,367,067,694.04/74,864.93
  6. Step 6: Final answer
    x = 71,690.02

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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.