Home / 142,172.70-196,231.95-81,778.23

Finding the Fourth Proportional to 142,172.70, 196,231.95 and 81,778.23

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Solution

The fourth proportional to 142,172.70, 196,231.95 and 81,778.23 is: 112,873.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,172.70 : 196,231.95 = 81,778.23 : x
  2. Step 2: Convert to fraction form
    142,172.70/196,231.95 = 81,778.23/x
  3. Step 3: Cross multiply
    142,172.70x = 196,231.95 × 81,778.23
  4. Step 4: Simplify right side
    142,172.70x = 16,047,501,540.45
  5. Step 5: Solve for x
    x = 16,047,501,540.45/142,172.70
  6. Step 6: Final answer
    x = 112,873.30

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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.