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Finding the Fourth Proportional to 70,879.20, 97,817.72 and 39,048.10

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Solution

The fourth proportional to 70,879.20, 97,817.72 and 39,048.10 is: 53,888.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,879.20 : 97,817.72 = 39,048.10 : x
  2. Step 2: Convert to fraction form
    70,879.20/97,817.72 = 39,048.10/x
  3. Step 3: Cross multiply
    70,879.20x = 97,817.72 × 39,048.10
  4. Step 4: Simplify right side
    70,879.20x = 3,819,596,112.33
  5. Step 5: Solve for x
    x = 3,819,596,112.33/70,879.20
  6. Step 6: Final answer
    x = 53,888.82

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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.