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Finding the Fourth Proportional to 111,340.90, 166,622.55 and 77,904.10

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Solution

The fourth proportional to 111,340.90, 166,622.55 and 77,904.10 is: 116,584.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,340.90 : 166,622.55 = 77,904.10 : x
  2. Step 2: Convert to fraction form
    111,340.90/166,622.55 = 77,904.10/x
  3. Step 3: Cross multiply
    111,340.90x = 166,622.55 × 77,904.10
  4. Step 4: Simplify right side
    111,340.90x = 12,980,579,797.46
  5. Step 5: Solve for x
    x = 12,980,579,797.46/111,340.90
  6. Step 6: Final answer
    x = 116,584.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.