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Finding the Fourth Proportional to 111,703.68, 154,163.52 and 61,401.60

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Solution

The fourth proportional to 111,703.68, 154,163.52 and 61,401.60 is: 84,741.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,703.68 : 154,163.52 = 61,401.60 : x
  2. Step 2: Convert to fraction form
    111,703.68/154,163.52 = 61,401.60/x
  3. Step 3: Cross multiply
    111,703.68x = 154,163.52 × 61,401.60
  4. Step 4: Simplify right side
    111,703.68x = 9,465,886,789.63
  5. Step 5: Solve for x
    x = 9,465,886,789.63/111,703.68
  6. Step 6: Final answer
    x = 84,741.05

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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.