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Finding the Fourth Proportional to 111,907.70, 154,439.62 and 61,606.70

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Solution

The fourth proportional to 111,907.70, 154,439.62 and 61,606.70 is: 85,021.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,907.70 : 154,439.62 = 61,606.70 : x
  2. Step 2: Convert to fraction form
    111,907.70/154,439.62 = 61,606.70/x
  3. Step 3: Cross multiply
    111,907.70x = 154,439.62 × 61,606.70
  4. Step 4: Simplify right side
    111,907.70x = 9,514,515,337.45
  5. Step 5: Solve for x
    x = 9,514,515,337.45/111,907.70
  6. Step 6: Final answer
    x = 85,021.10

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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.