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Finding the Fourth Proportional to 70,497.95, 105,722.33 and 28,367.12

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Solution

The fourth proportional to 70,497.95, 105,722.33 and 28,367.12 is: 42,540.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,497.95 : 105,722.33 = 28,367.12 : x
  2. Step 2: Convert to fraction form
    70,497.95/105,722.33 = 28,367.12/x
  3. Step 3: Cross multiply
    70,497.95x = 105,722.33 × 28,367.12
  4. Step 4: Simplify right side
    70,497.95x = 2,999,038,021.79
  5. Step 5: Solve for x
    x = 2,999,038,021.79/70,497.95
  6. Step 6: Final answer
    x = 42,540.78

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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.