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Finding the Fourth Proportional to 219,401.40, 329,066.90 and 79,087.80

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Solution

The fourth proportional to 219,401.40, 329,066.90 and 79,087.80 is: 118,619.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,401.40 : 329,066.90 = 79,087.80 : x
  2. Step 2: Convert to fraction form
    219,401.40/329,066.90 = 79,087.80/x
  3. Step 3: Cross multiply
    219,401.40x = 329,066.90 × 79,087.80
  4. Step 4: Simplify right side
    219,401.40x = 26,025,177,173.82
  5. Step 5: Solve for x
    x = 26,025,177,173.82/219,401.40
  6. Step 6: Final answer
    x = 118,619.01

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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.