Home / 143,428.20-197,935.70-78,900.12

Finding the Fourth Proportional to 143,428.20, 197,935.70 and 78,900.12

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Solution

The fourth proportional to 143,428.20, 197,935.70 and 78,900.12 is: 108,884.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,428.20 : 197,935.70 = 78,900.12 : x
  2. Step 2: Convert to fraction form
    143,428.20/197,935.70 = 78,900.12/x
  3. Step 3: Cross multiply
    143,428.20x = 197,935.70 × 78,900.12
  4. Step 4: Simplify right side
    143,428.20x = 15,617,150,482.28
  5. Step 5: Solve for x
    x = 15,617,150,482.28/143,428.20
  6. Step 6: Final answer
    x = 108,884.80

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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.