Home / 78,435.38-117,653.40-19,271.06

Finding the Fourth Proportional to 78,435.38, 117,653.40 and 19,271.06

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Solution

The fourth proportional to 78,435.38, 117,653.40 and 19,271.06 is: 28,906.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,435.38 : 117,653.40 = 19,271.06 : x
  2. Step 2: Convert to fraction form
    78,435.38/117,653.40 = 19,271.06/x
  3. Step 3: Cross multiply
    78,435.38x = 117,653.40 × 19,271.06
  4. Step 4: Simplify right side
    78,435.38x = 2,267,305,730.60
  5. Step 5: Solve for x
    x = 2,267,305,730.60/78,435.38
  6. Step 6: Final answer
    x = 28,906.67

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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.