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Finding the Fourth Proportional to 111,730.64, 154,188.28 and 61,429.64

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Solution

The fourth proportional to 111,730.64, 154,188.28 and 61,429.64 is: 84,772.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,730.64 : 154,188.28 = 61,429.64 : x
  2. Step 2: Convert to fraction form
    111,730.64/154,188.28 = 61,429.64/x
  3. Step 3: Cross multiply
    111,730.64x = 154,188.28 × 61,429.64
  4. Step 4: Simplify right side
    111,730.64x = 9,471,730,878.54
  5. Step 5: Solve for x
    x = 9,471,730,878.54/111,730.64
  6. Step 6: Final answer
    x = 84,772.90

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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.