Home / 78,206.40-117,280.80-25,617.60

Finding the Fourth Proportional to 78,206.40, 117,280.80 and 25,617.60

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Solution

The fourth proportional to 78,206.40, 117,280.80 and 25,617.60 is: 38,416.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,206.40 : 117,280.80 = 25,617.60 : x
  2. Step 2: Convert to fraction form
    78,206.40/117,280.80 = 25,617.60/x
  3. Step 3: Cross multiply
    78,206.40x = 117,280.80 × 25,617.60
  4. Step 4: Simplify right side
    78,206.40x = 3,004,452,622.08
  5. Step 5: Solve for x
    x = 3,004,452,622.08/78,206.40
  6. Step 6: Final answer
    x = 38,416.97

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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.