Home / 78,548.63-117,821.18-19,384.81

Finding the Fourth Proportional to 78,548.63, 117,821.18 and 19,384.81

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Solution

The fourth proportional to 78,548.63, 117,821.18 and 19,384.81 is: 29,076.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,548.63 : 117,821.18 = 19,384.81 : x
  2. Step 2: Convert to fraction form
    78,548.63/117,821.18 = 19,384.81/x
  3. Step 3: Cross multiply
    78,548.63x = 117,821.18 × 19,384.81
  4. Step 4: Simplify right side
    78,548.63x = 2,283,940,942.18
  5. Step 5: Solve for x
    x = 2,283,940,942.18/78,548.63
  6. Step 6: Final answer
    x = 29,076.78

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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.