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Finding the Fourth Proportional to 105,993.90, 158,990.92 and 39,425.40

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Solution

The fourth proportional to 105,993.90, 158,990.92 and 39,425.40 is: 59,138.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,993.90 : 158,990.92 = 39,425.40 : x
  2. Step 2: Convert to fraction form
    105,993.90/158,990.92 = 39,425.40/x
  3. Step 3: Cross multiply
    105,993.90x = 158,990.92 × 39,425.40
  4. Step 4: Simplify right side
    105,993.90x = 6,268,280,518.80
  5. Step 5: Solve for x
    x = 6,268,280,518.80/105,993.90
  6. Step 6: Final answer
    x = 59,138.13

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1.5x scale

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.