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Finding the Fourth Proportional to 103,319.98, 154,979.97 and 40,990.48

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Solution

The fourth proportional to 103,319.98, 154,979.97 and 40,990.48 is: 61,485.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,319.98 : 154,979.97 = 40,990.48 : x
  2. Step 2: Convert to fraction form
    103,319.98/154,979.97 = 40,990.48/x
  3. Step 3: Cross multiply
    103,319.98x = 154,979.97 × 40,990.48
  4. Step 4: Simplify right side
    103,319.98x = 6,352,703,360.69
  5. Step 5: Solve for x
    x = 6,352,703,360.69/103,319.98
  6. Step 6: Final answer
    x = 61,485.72

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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.