Home / 85,742.79-128,631.47-30,377.67

Finding the Fourth Proportional to 85,742.79, 128,631.47 and 30,377.67

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Solution

The fourth proportional to 85,742.79, 128,631.47 and 30,377.67 is: 45,572.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,742.79 : 128,631.47 = 30,377.67 : x
  2. Step 2: Convert to fraction form
    85,742.79/128,631.47 = 30,377.67/x
  3. Step 3: Cross multiply
    85,742.79x = 128,631.47 × 30,377.67
  4. Step 4: Simplify right side
    85,742.79x = 3,907,524,195.39
  5. Step 5: Solve for x
    x = 3,907,524,195.39/85,742.79
  6. Step 6: Final answer
    x = 45,572.63

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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.