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Finding the Fourth Proportional to 112,604.47, 155,326.47 and 74,364.37

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Solution

The fourth proportional to 112,604.47, 155,326.47 and 74,364.37 is: 102,578.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,604.47 : 155,326.47 = 74,364.37 : x
  2. Step 2: Convert to fraction form
    112,604.47/155,326.47 = 74,364.37/x
  3. Step 3: Cross multiply
    112,604.47x = 155,326.47 × 74,364.37
  4. Step 4: Simplify right side
    112,604.47x = 11,550,755,085.87
  5. Step 5: Solve for x
    x = 11,550,755,085.87/112,604.47
  6. Step 6: Final answer
    x = 102,578.12

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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.