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Finding the Fourth Proportional to 111,768.64, 154,237.64 and 61,467.68

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Solution

The fourth proportional to 111,768.64, 154,237.64 and 61,467.68 is: 84,823.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,768.64 : 154,237.64 = 61,467.68 : x
  2. Step 2: Convert to fraction form
    111,768.64/154,237.64 = 61,467.68/x
  3. Step 3: Cross multiply
    111,768.64x = 154,237.64 × 61,467.68
  4. Step 4: Simplify right side
    111,768.64x = 9,480,629,899.48
  5. Step 5: Solve for x
    x = 9,480,629,899.48/111,768.64
  6. Step 6: Final answer
    x = 84,823.70

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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.