Home / 78,590.58-117,903.38-28,670.67

Finding the Fourth Proportional to 78,590.58, 117,903.38 and 28,670.67

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Solution

The fourth proportional to 78,590.58, 117,903.38 and 28,670.67 is: 43,012.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,590.58 : 117,903.38 = 28,670.67 : x
  2. Step 2: Convert to fraction form
    78,590.58/117,903.38 = 28,670.67/x
  3. Step 3: Cross multiply
    78,590.58x = 117,903.38 × 28,670.67
  4. Step 4: Simplify right side
    78,590.58x = 3,380,369,266.33
  5. Step 5: Solve for x
    x = 3,380,369,266.33/78,590.58
  6. Step 6: Final answer
    x = 43,012.40

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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.