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Finding the Fourth Proportional to 112,122.41, 154,728.29 and 61,821.41

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Solution

The fourth proportional to 112,122.41, 154,728.29 and 61,821.41 is: 85,313.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,122.41 : 154,728.29 = 61,821.41 : x
  2. Step 2: Convert to fraction form
    112,122.41/154,728.29 = 61,821.41/x
  3. Step 3: Cross multiply
    112,122.41x = 154,728.29 × 61,821.41
  4. Step 4: Simplify right side
    112,122.41x = 9,565,520,435.60
  5. Step 5: Solve for x
    x = 9,565,520,435.60/112,122.41
  6. Step 6: Final answer
    x = 85,313.19

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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.