Home / 142,312.44-196,389.57-77,780.97

Finding the Fourth Proportional to 142,312.44, 196,389.57 and 77,780.97

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Solution

The fourth proportional to 142,312.44, 196,389.57 and 77,780.97 is: 107,336.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,312.44 : 196,389.57 = 77,780.97 : x
  2. Step 2: Convert to fraction form
    142,312.44/196,389.57 = 77,780.97/x
  3. Step 3: Cross multiply
    142,312.44x = 196,389.57 × 77,780.97
  4. Step 4: Simplify right side
    142,312.44x = 15,275,371,252.48
  5. Step 5: Solve for x
    x = 15,275,371,252.48/142,312.44
  6. Step 6: Final answer
    x = 107,336.87

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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.