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Finding the Fourth Proportional to 103,318.98, 154,958.07 and 28,419.80

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Solution

The fourth proportional to 103,318.98, 154,958.07 and 28,419.80 is: 42,624.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,318.98 : 154,958.07 = 28,419.80 : x
  2. Step 2: Convert to fraction form
    103,318.98/154,958.07 = 28,419.80/x
  3. Step 3: Cross multiply
    103,318.98x = 154,958.07 × 28,419.80
  4. Step 4: Simplify right side
    103,318.98x = 4,403,876,885.60
  5. Step 5: Solve for x
    x = 4,403,876,885.60/103,318.98
  6. Step 6: Final answer
    x = 42,624.08

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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.