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Finding the Fourth Proportional to 111,949.74, 154,443.51 and 74,158.38

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Solution

The fourth proportional to 111,949.74, 154,443.51 and 74,158.38 is: 102,307.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,949.74 : 154,443.51 = 74,158.38 : x
  2. Step 2: Convert to fraction form
    111,949.74/154,443.51 = 74,158.38/x
  3. Step 3: Cross multiply
    111,949.74x = 154,443.51 × 74,158.38
  4. Step 4: Simplify right side
    111,949.74x = 11,453,280,503.11
  5. Step 5: Solve for x
    x = 11,453,280,503.11/111,949.74
  6. Step 6: Final answer
    x = 102,307.34

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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.