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Finding the Fourth Proportional to 111,138.30, 153,367.83 and 63,390.63

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Solution

The fourth proportional to 111,138.30, 153,367.83 and 63,390.63 is: 87,477.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,138.30 : 153,367.83 = 63,390.63 : x
  2. Step 2: Convert to fraction form
    111,138.30/153,367.83 = 63,390.63/x
  3. Step 3: Cross multiply
    111,138.30x = 153,367.83 × 63,390.63
  4. Step 4: Simplify right side
    111,138.30x = 9,722,083,365.43
  5. Step 5: Solve for x
    x = 9,722,083,365.43/111,138.30
  6. Step 6: Final answer
    x = 87,477.34

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1.5x scale

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.