Home / 78,106.51-117,158.73-18,942.76

Finding the Fourth Proportional to 78,106.51, 117,158.73 and 18,942.76

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Solution

The fourth proportional to 78,106.51, 117,158.73 and 18,942.76 is: 28,413.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,106.51 : 117,158.73 = 18,942.76 : x
  2. Step 2: Convert to fraction form
    78,106.51/117,158.73 = 18,942.76/x
  3. Step 3: Cross multiply
    78,106.51x = 117,158.73 × 18,942.76
  4. Step 4: Simplify right side
    78,106.51x = 2,219,309,704.29
  5. Step 5: Solve for x
    x = 2,219,309,704.29/78,106.51
  6. Step 6: Final answer
    x = 28,413.89

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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.