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Finding the Fourth Proportional to 111,937.86, 154,605.48 and 74,146.50

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Solution

The fourth proportional to 111,937.86, 154,605.48 and 74,146.50 is: 102,409.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,937.86 : 154,605.48 = 74,146.50 : x
  2. Step 2: Convert to fraction form
    111,937.86/154,605.48 = 74,146.50/x
  3. Step 3: Cross multiply
    111,937.86x = 154,605.48 × 74,146.50
  4. Step 4: Simplify right side
    111,937.86x = 11,463,455,222.82
  5. Step 5: Solve for x
    x = 11,463,455,222.82/111,937.86
  6. Step 6: Final answer
    x = 102,409.10

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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.