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Finding the Fourth Proportional to 111,709.64, 154,166.28 and 63,961.76

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Solution

The fourth proportional to 111,709.64, 154,166.28 and 63,961.76 is: 88,271.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,709.64 : 154,166.28 = 63,961.76 : x
  2. Step 2: Convert to fraction form
    111,709.64/154,166.28 = 63,961.76/x
  3. Step 3: Cross multiply
    111,709.64x = 154,166.28 × 63,961.76
  4. Step 4: Simplify right side
    111,709.64x = 9,860,746,601.45
  5. Step 5: Solve for x
    x = 9,860,746,601.45/111,709.64
  6. Step 6: Final answer
    x = 88,271.22

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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.