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Finding the Fourth Proportional to 209,993.70, 314,990.55 and 126,012.90

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Solution

The fourth proportional to 209,993.70, 314,990.55 and 126,012.90 is: 189,019.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,993.70 : 314,990.55 = 126,012.90 : x
  2. Step 2: Convert to fraction form
    209,993.70/314,990.55 = 126,012.90/x
  3. Step 3: Cross multiply
    209,993.70x = 314,990.55 × 126,012.90
  4. Step 4: Simplify right side
    209,993.70x = 39,692,872,678.10
  5. Step 5: Solve for x
    x = 39,692,872,678.10/209,993.70
  6. Step 6: Final answer
    x = 189,019.35

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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.