Home / 78,009.04-117,013.20-18,844.54

Finding the Fourth Proportional to 78,009.04, 117,013.20 and 18,844.54

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Solution

The fourth proportional to 78,009.04, 117,013.20 and 18,844.54 is: 28,266.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,009.04 : 117,013.20 = 18,844.54 : x
  2. Step 2: Convert to fraction form
    78,009.04/117,013.20 = 18,844.54/x
  3. Step 3: Cross multiply
    78,009.04x = 117,013.20 × 18,844.54
  4. Step 4: Simplify right side
    78,009.04x = 2,205,059,927.93
  5. Step 5: Solve for x
    x = 2,205,059,927.93/78,009.04
  6. Step 6: Final answer
    x = 28,266.72

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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.