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Finding the Fourth Proportional to 111,037.80, 166,556.70 and 77,212.20

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Solution

The fourth proportional to 111,037.80, 166,556.70 and 77,212.20 is: 115,818.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,037.80 : 166,556.70 = 77,212.20 : x
  2. Step 2: Convert to fraction form
    111,037.80/166,556.70 = 77,212.20/x
  3. Step 3: Cross multiply
    111,037.80x = 166,556.70 × 77,212.20
  4. Step 4: Simplify right side
    111,037.80x = 12,860,209,231.74
  5. Step 5: Solve for x
    x = 12,860,209,231.74/111,037.80
  6. Step 6: Final answer
    x = 115,818.30

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1.5x scale

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.