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Finding the Fourth Proportional to 218,163.98, 300,943.28 and 130,926.78

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Solution

The fourth proportional to 218,163.98, 300,943.28 and 130,926.78 is: 180,605.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,163.98 : 300,943.28 = 130,926.78 : x
  2. Step 2: Convert to fraction form
    218,163.98/300,943.28 = 130,926.78/x
  3. Step 3: Cross multiply
    218,163.98x = 300,943.28 × 130,926.78
  4. Step 4: Simplify right side
    218,163.98x = 39,401,534,613.04
  5. Step 5: Solve for x
    x = 39,401,534,613.04/218,163.98
  6. Step 6: Final answer
    x = 180,605.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.