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Finding the Fourth Proportional to 209,366.70, 313,952.85 and 90,977.10

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Solution

The fourth proportional to 209,366.70, 313,952.85 and 90,977.10 is: 136,423.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,366.70 : 313,952.85 = 90,977.10 : x
  2. Step 2: Convert to fraction form
    209,366.70/313,952.85 = 90,977.10/x
  3. Step 3: Cross multiply
    209,366.70x = 313,952.85 × 90,977.10
  4. Step 4: Simplify right side
    209,366.70x = 28,562,519,829.74
  5. Step 5: Solve for x
    x = 28,562,519,829.74/209,366.70
  6. Step 6: Final answer
    x = 136,423.41

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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.