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Finding the Fourth Proportional to 209,620.60, 314,430.90 and 125,639.80

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Solution

The fourth proportional to 209,620.60, 314,430.90 and 125,639.80 is: 188,459.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,620.60 : 314,430.90 = 125,639.80 : x
  2. Step 2: Convert to fraction form
    209,620.60/314,430.90 = 125,639.80/x
  3. Step 3: Cross multiply
    209,620.60x = 314,430.90 × 125,639.80
  4. Step 4: Simplify right side
    209,620.60x = 39,505,035,389.82
  5. Step 5: Solve for x
    x = 39,505,035,389.82/209,620.60
  6. Step 6: Final answer
    x = 188,459.70

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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.