Home / 78,311.58-117,466.32-19,147.76

Finding the Fourth Proportional to 78,311.58, 117,466.32 and 19,147.76

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Solution

The fourth proportional to 78,311.58, 117,466.32 and 19,147.76 is: 28,721.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,311.58 : 117,466.32 = 19,147.76 : x
  2. Step 2: Convert to fraction form
    78,311.58/117,466.32 = 19,147.76/x
  3. Step 3: Cross multiply
    78,311.58x = 117,466.32 × 19,147.76
  4. Step 4: Simplify right side
    78,311.58x = 2,249,216,903.44
  5. Step 5: Solve for x
    x = 2,249,216,903.44/78,311.58
  6. Step 6: Final answer
    x = 28,721.38

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1.5x scale

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.