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Finding the Fourth Proportional to 209,040.40, 313,589.40 and 90,708.40

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Solution

The fourth proportional to 209,040.40, 313,589.40 and 90,708.40 is: 136,075.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,040.40 : 313,589.40 = 90,708.40 : x
  2. Step 2: Convert to fraction form
    209,040.40/313,589.40 = 90,708.40/x
  3. Step 3: Cross multiply
    209,040.40x = 313,589.40 × 90,708.40
  4. Step 4: Simplify right side
    209,040.40x = 28,445,192,730.96
  5. Step 5: Solve for x
    x = 28,445,192,730.96/209,040.40
  6. Step 6: Final answer
    x = 136,075.10

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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.