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Finding the Fourth Proportional to 209,014.63, 313,605.02 and 66,881.80

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Solution

The fourth proportional to 209,014.63, 313,605.02 and 66,881.80 is: 100,349.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,014.63 : 313,605.02 = 66,881.80 : x
  2. Step 2: Convert to fraction form
    209,014.63/313,605.02 = 66,881.80/x
  3. Step 3: Cross multiply
    209,014.63x = 313,605.02 × 66,881.80
  4. Step 4: Simplify right side
    209,014.63x = 20,974,468,226.64
  5. Step 5: Solve for x
    x = 20,974,468,226.64/209,014.63
  6. Step 6: Final answer
    x = 100,349.28

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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.