Home / 128,845.78-193,109.59-93,428.67

Finding the Fourth Proportional to 128,845.78, 193,109.59 and 93,428.67

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Solution

The fourth proportional to 128,845.78, 193,109.59 and 93,428.67 is: 140,027.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,845.78 : 193,109.59 = 93,428.67 : x
  2. Step 2: Convert to fraction form
    128,845.78/193,109.59 = 93,428.67/x
  3. Step 3: Cross multiply
    128,845.78x = 193,109.59 × 93,428.67
  4. Step 4: Simplify right side
    128,845.78x = 18,041,972,157.95
  5. Step 5: Solve for x
    x = 18,041,972,157.95/128,845.78
  6. Step 6: Final answer
    x = 140,027.65

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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.