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Finding the Fourth Proportional to 209,941.20, 314,911.80 and 125,960.40

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Solution

The fourth proportional to 209,941.20, 314,911.80 and 125,960.40 is: 188,940.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,941.20 : 314,911.80 = 125,960.40 : x
  2. Step 2: Convert to fraction form
    209,941.20/314,911.80 = 125,960.40/x
  3. Step 3: Cross multiply
    209,941.20x = 314,911.80 × 125,960.40
  4. Step 4: Simplify right side
    209,941.20x = 39,666,416,292.72
  5. Step 5: Solve for x
    x = 39,666,416,292.72/209,941.20
  6. Step 6: Final answer
    x = 188,940.60

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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.