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Finding the Fourth Proportional to 112,418, 155,068.96 and 74,163.96

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Solution

The fourth proportional to 112,418, 155,068.96 and 74,163.96 is: 102,301.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,418 : 155,068.96 = 74,163.96 : x
  2. Step 2: Convert to fraction form
    112,418/155,068.96 = 74,163.96/x
  3. Step 3: Cross multiply
    112,418x = 155,068.96 × 74,163.96
  4. Step 4: Simplify right side
    112,418x = 11,500,528,146.68
  5. Step 5: Solve for x
    x = 11,500,528,146.68/112,418
  6. Step 6: Final answer
    x = 102,301.48

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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.