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Finding the Fourth Proportional to 111,913.62, 154,455.54 and 64,157.73

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Solution

The fourth proportional to 111,913.62, 154,455.54 and 64,157.73 is: 88,546.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,913.62 : 154,455.54 = 64,157.73 : x
  2. Step 2: Convert to fraction form
    111,913.62/154,455.54 = 64,157.73/x
  3. Step 3: Cross multiply
    111,913.62x = 154,455.54 × 64,157.73
  4. Step 4: Simplify right side
    111,913.62x = 9,909,516,832.32
  5. Step 5: Solve for x
    x = 9,909,516,832.32/111,913.62
  6. Step 6: Final answer
    x = 88,546.12

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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.