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Finding the Fourth Proportional to 70,804.86, 97,709.67 and 38,972.94

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Solution

The fourth proportional to 70,804.86, 97,709.67 and 38,972.94 is: 53,782.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,804.86 : 97,709.67 = 38,972.94 : x
  2. Step 2: Convert to fraction form
    70,804.86/97,709.67 = 38,972.94/x
  3. Step 3: Cross multiply
    70,804.86x = 97,709.67 × 38,972.94
  4. Step 4: Simplify right side
    70,804.86x = 3,808,033,106.33
  5. Step 5: Solve for x
    x = 3,808,033,106.33/70,804.86
  6. Step 6: Final answer
    x = 53,782.09

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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.