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Finding the Fourth Proportional to 112,170.51, 154,792.85 and 61,869.51

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Solution

The fourth proportional to 112,170.51, 154,792.85 and 61,869.51 is: 85,378.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,170.51 : 154,792.85 = 61,869.51 : x
  2. Step 2: Convert to fraction form
    112,170.51/154,792.85 = 61,869.51/x
  3. Step 3: Cross multiply
    112,170.51x = 154,792.85 × 61,869.51
  4. Step 4: Simplify right side
    112,170.51x = 9,576,957,471.66
  5. Step 5: Solve for x
    x = 9,576,957,471.66/112,170.51
  6. Step 6: Final answer
    x = 85,378.57

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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.