Home / 78,289.03-117,530.34-74,155.60

Finding the Fourth Proportional to 78,289.03, 117,530.34 and 74,155.60

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Solution

The fourth proportional to 78,289.03, 117,530.34 and 74,155.60 is: 111,325.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,289.03 : 117,530.34 = 74,155.60 : x
  2. Step 2: Convert to fraction form
    78,289.03/117,530.34 = 74,155.60/x
  3. Step 3: Cross multiply
    78,289.03x = 117,530.34 × 74,155.60
  4. Step 4: Simplify right side
    78,289.03x = 8,715,533,166.86
  5. Step 5: Solve for x
    x = 8,715,533,166.86/78,289.03
  6. Step 6: Final answer
    x = 111,325.09

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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.