Home / 409,119.81-613,719.36-139,438.11

Finding the Fourth Proportional to 409,119.81, 613,719.36 and 139,438.11

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Solution

The fourth proportional to 409,119.81, 613,719.36 and 139,438.11 is: 209,170.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,119.81 : 613,719.36 = 139,438.11 : x
  2. Step 2: Convert to fraction form
    409,119.81/613,719.36 = 139,438.11/x
  3. Step 3: Cross multiply
    409,119.81x = 613,719.36 × 139,438.11
  4. Step 4: Simplify right side
    409,119.81x = 85,575,866,085.92
  5. Step 5: Solve for x
    x = 85,575,866,085.92/409,119.81
  6. Step 6: Final answer
    x = 209,170.67

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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.