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Finding the Fourth Proportional to 111,109.84, 153,172.20 and 79,223.44

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Solution

The fourth proportional to 111,109.84, 153,172.20 and 79,223.44 is: 109,214.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,109.84 : 153,172.20 = 79,223.44 : x
  2. Step 2: Convert to fraction form
    111,109.84/153,172.20 = 79,223.44/x
  3. Step 3: Cross multiply
    111,109.84x = 153,172.20 × 79,223.44
  4. Step 4: Simplify right side
    111,109.84x = 12,134,828,596.37
  5. Step 5: Solve for x
    x = 12,134,828,596.37/111,109.84
  6. Step 6: Final answer
    x = 109,214.71

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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.