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Finding the Fourth Proportional to 111,005.20, 166,507.80 and 77,762.80

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Solution

The fourth proportional to 111,005.20, 166,507.80 and 77,762.80 is: 116,644.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,005.20 : 166,507.80 = 77,762.80 : x
  2. Step 2: Convert to fraction form
    111,005.20/166,507.80 = 77,762.80/x
  3. Step 3: Cross multiply
    111,005.20x = 166,507.80 × 77,762.80
  4. Step 4: Simplify right side
    111,005.20x = 12,948,112,749.84
  5. Step 5: Solve for x
    x = 12,948,112,749.84/111,005.20
  6. Step 6: Final answer
    x = 116,644.20

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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.