Home / 100,730.05-139,007.74-55,412.67

Finding the Fourth Proportional to 100,730.05, 139,007.74 and 55,412.67

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Solution

The fourth proportional to 100,730.05, 139,007.74 and 55,412.67 is: 76,469.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,730.05 : 139,007.74 = 55,412.67 : x
  2. Step 2: Convert to fraction form
    100,730.05/139,007.74 = 55,412.67/x
  3. Step 3: Cross multiply
    100,730.05x = 139,007.74 × 55,412.67
  4. Step 4: Simplify right side
    100,730.05x = 7,702,790,024.07
  5. Step 5: Solve for x
    x = 7,702,790,024.07/100,730.05
  6. Step 6: Final answer
    x = 76,469.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.