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Finding the Fourth Proportional to 77,605.64, 116,443.02 and 40,661

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Solution

The fourth proportional to 77,605.64, 116,443.02 and 40,661 is: 61,009.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,605.64 : 116,443.02 = 40,661 : x
  2. Step 2: Convert to fraction form
    77,605.64/116,443.02 = 40,661/x
  3. Step 3: Cross multiply
    77,605.64x = 116,443.02 × 40,661
  4. Step 4: Simplify right side
    77,605.64x = 4,734,689,636.22
  5. Step 5: Solve for x
    x = 4,734,689,636.22/77,605.64
  6. Step 6: Final answer
    x = 61,009.61

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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.