Home / 128,980.04-193,431.18-45,869

Finding the Fourth Proportional to 128,980.04, 193,431.18 and 45,869

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Solution

The fourth proportional to 128,980.04, 193,431.18 and 45,869 is: 68,789.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,980.04 : 193,431.18 = 45,869 : x
  2. Step 2: Convert to fraction form
    128,980.04/193,431.18 = 45,869/x
  3. Step 3: Cross multiply
    128,980.04x = 193,431.18 × 45,869
  4. Step 4: Simplify right side
    128,980.04x = 8,872,494,795.42
  5. Step 5: Solve for x
    x = 8,872,494,795.42/128,980.04
  6. Step 6: Final answer
    x = 68,789.67

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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.