Home / 78,511.78-117,673.87-28,533.36

Finding the Fourth Proportional to 78,511.78, 117,673.87 and 28,533.36

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Solution

The fourth proportional to 78,511.78, 117,673.87 and 28,533.36 is: 42,765.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,511.78 : 117,673.87 = 28,533.36 : x
  2. Step 2: Convert to fraction form
    78,511.78/117,673.87 = 28,533.36/x
  3. Step 3: Cross multiply
    78,511.78x = 117,673.87 × 28,533.36
  4. Step 4: Simplify right side
    78,511.78x = 3,357,630,164.27
  5. Step 5: Solve for x
    x = 3,357,630,164.27/78,511.78
  6. Step 6: Final answer
    x = 42,765.94

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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.