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Finding the Fourth Proportional to 111,640.32, 153,904.32 and 79,797.60

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Solution

The fourth proportional to 111,640.32, 153,904.32 and 79,797.60 is: 110,006.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,640.32 : 153,904.32 = 79,797.60 : x
  2. Step 2: Convert to fraction form
    111,640.32/153,904.32 = 79,797.60/x
  3. Step 3: Cross multiply
    111,640.32x = 153,904.32 × 79,797.60
  4. Step 4: Simplify right side
    111,640.32x = 12,281,195,365.63
  5. Step 5: Solve for x
    x = 12,281,195,365.63/111,640.32
  6. Step 6: Final answer
    x = 110,006.81

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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.