Home / 142,091.16-196,085.81-78,428.97

Finding the Fourth Proportional to 142,091.16, 196,085.81 and 78,428.97

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Solution

The fourth proportional to 142,091.16, 196,085.81 and 78,428.97 is: 108,231.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,091.16 : 196,085.81 = 78,428.97 : x
  2. Step 2: Convert to fraction form
    142,091.16/196,085.81 = 78,428.97/x
  3. Step 3: Cross multiply
    142,091.16x = 196,085.81 × 78,428.97
  4. Step 4: Simplify right side
    142,091.16x = 15,378,808,305.99
  5. Step 5: Solve for x
    x = 15,378,808,305.99/142,091.16
  6. Step 6: Final answer
    x = 108,231.99

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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.