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Finding the Fourth Proportional to 74,759.16, 112,138.74 and 51,314.52

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Solution

The fourth proportional to 74,759.16, 112,138.74 and 51,314.52 is: 76,971.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,759.16 : 112,138.74 = 51,314.52 : x
  2. Step 2: Convert to fraction form
    74,759.16/112,138.74 = 51,314.52/x
  3. Step 3: Cross multiply
    74,759.16x = 112,138.74 × 51,314.52
  4. Step 4: Simplify right side
    74,759.16x = 5,754,345,616.50
  5. Step 5: Solve for x
    x = 5,754,345,616.50/74,759.16
  6. Step 6: Final answer
    x = 76,971.78

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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.