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Finding the Fourth Proportional to 79,368.56, 118,768.58 and 68,731.76

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Solution

The fourth proportional to 79,368.56, 118,768.58 and 68,731.76 is: 102,851.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,368.56 : 118,768.58 = 68,731.76 : x
  2. Step 2: Convert to fraction form
    79,368.56/118,768.58 = 68,731.76/x
  3. Step 3: Cross multiply
    79,368.56x = 118,768.58 × 68,731.76
  4. Step 4: Simplify right side
    79,368.56x = 8,163,173,536.10
  5. Step 5: Solve for x
    x = 8,163,173,536.10/79,368.56
  6. Step 6: Final answer
    x = 102,851.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.