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Finding the Fourth Proportional to 111,668,207.70, 167,502,311.55 and 85,840,175.10

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Solution

The fourth proportional to 111,668,207.70, 167,502,311.55 and 85,840,175.10 is: 128,760,262.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,668,207.70 : 167,502,311.55 = 85,840,175.10 : x
  2. Step 2: Convert to fraction form
    111,668,207.70/167,502,311.55 = 85,840,175.10/x
  3. Step 3: Cross multiply
    111,668,207.70x = 167,502,311.55 × 85,840,175.10
  4. Step 4: Simplify right side
    111,668,207.70x = 14,378,427,753,106,752
  5. Step 5: Solve for x
    x = 14,378,427,753,106,752/111,668,207.70
  6. Step 6: Final answer
    x = 128,760,262.65

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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.