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Finding the Fourth Proportional to 200,520.40, 300,780.60 and 125,870.80

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Solution

The fourth proportional to 200,520.40, 300,780.60 and 125,870.80 is: 188,806.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,520.40 : 300,780.60 = 125,870.80 : x
  2. Step 2: Convert to fraction form
    200,520.40/300,780.60 = 125,870.80/x
  3. Step 3: Cross multiply
    200,520.40x = 300,780.60 × 125,870.80
  4. Step 4: Simplify right side
    200,520.40x = 37,859,494,746.48
  5. Step 5: Solve for x
    x = 37,859,494,746.48/200,520.40
  6. Step 6: Final answer
    x = 188,806.20

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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.