Home / 142,279.71-196,345.94-78,616.95

Finding the Fourth Proportional to 142,279.71, 196,345.94 and 78,616.95

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Solution

The fourth proportional to 142,279.71, 196,345.94 and 78,616.95 is: 108,491.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,279.71 : 196,345.94 = 78,616.95 : x
  2. Step 2: Convert to fraction form
    142,279.71/196,345.94 = 78,616.95/x
  3. Step 3: Cross multiply
    142,279.71x = 196,345.94 × 78,616.95
  4. Step 4: Simplify right side
    142,279.71x = 15,436,118,554.60
  5. Step 5: Solve for x
    x = 15,436,118,554.60/142,279.71
  6. Step 6: Final answer
    x = 108,491.36

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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.