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Finding the Fourth Proportional to 111,157.45, 153,485.69 and 102,656.46

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Solution

The fourth proportional to 111,157.45, 153,485.69 and 102,656.46 is: 141,747.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,157.45 : 153,485.69 = 102,656.46 : x
  2. Step 2: Convert to fraction form
    111,157.45/153,485.69 = 102,656.46/x
  3. Step 3: Cross multiply
    111,157.45x = 153,485.69 × 102,656.46
  4. Step 4: Simplify right side
    111,157.45x = 15,756,297,658.35
  5. Step 5: Solve for x
    x = 15,756,297,658.35/111,157.45
  6. Step 6: Final answer
    x = 141,747.57

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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.