Home / 142,418.22-196,515.64-78,756.48

Finding the Fourth Proportional to 142,418.22, 196,515.64 and 78,756.48

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Solution

The fourth proportional to 142,418.22, 196,515.64 and 78,756.48 is: 108,672.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,418.22 : 196,515.64 = 78,756.48 : x
  2. Step 2: Convert to fraction form
    142,418.22/196,515.64 = 78,756.48/x
  3. Step 3: Cross multiply
    142,418.22x = 196,515.64 × 78,756.48
  4. Step 4: Simplify right side
    142,418.22x = 15,476,880,071.35
  5. Step 5: Solve for x
    x = 15,476,880,071.35/142,418.22
  6. Step 6: Final answer
    x = 108,672.05

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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.