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Finding the Fourth Proportional to 70,736, 97,620.48 and 40,928

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Solution

The fourth proportional to 70,736, 97,620.48 and 40,928 is: 56,483.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,736 : 97,620.48 = 40,928 : x
  2. Step 2: Convert to fraction form
    70,736/97,620.48 = 40,928/x
  3. Step 3: Cross multiply
    70,736x = 97,620.48 × 40,928
  4. Step 4: Simplify right side
    70,736x = 3,995,411,005.44
  5. Step 5: Solve for x
    x = 3,995,411,005.44/70,736
  6. Step 6: Final answer
    x = 56,483.42

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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.