Home / 142,420.49-196,480.91-81,976.67

Finding the Fourth Proportional to 142,420.49, 196,480.91 and 81,976.67

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Solution

The fourth proportional to 142,420.49, 196,480.91 and 81,976.67 is: 113,093.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,420.49 : 196,480.91 = 81,976.67 : x
  2. Step 2: Convert to fraction form
    142,420.49/196,480.91 = 81,976.67/x
  3. Step 3: Cross multiply
    142,420.49x = 196,480.91 × 81,976.67
  4. Step 4: Simplify right side
    142,420.49x = 16,106,849,942.91
  5. Step 5: Solve for x
    x = 16,106,849,942.91/142,420.49
  6. Step 6: Final answer
    x = 113,093.63

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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.