Home / 142,091.61-196,072.44-78,425.28

Finding the Fourth Proportional to 142,091.61, 196,072.44 and 78,425.28

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Solution

The fourth proportional to 142,091.61, 196,072.44 and 78,425.28 is: 108,219.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,091.61 : 196,072.44 = 78,425.28 : x
  2. Step 2: Convert to fraction form
    142,091.61/196,072.44 = 78,425.28/x
  3. Step 3: Cross multiply
    142,091.61x = 196,072.44 × 78,425.28
  4. Step 4: Simplify right side
    142,091.61x = 15,377,036,007.28
  5. Step 5: Solve for x
    x = 15,377,036,007.28/142,091.61
  6. Step 6: Final answer
    x = 108,219.17

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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.