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Finding the Fourth Proportional to 70,089.68, 96,720.37 and 39,872.15

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Solution

The fourth proportional to 70,089.68, 96,720.37 and 39,872.15 is: 55,021.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,089.68 : 96,720.37 = 39,872.15 : x
  2. Step 2: Convert to fraction form
    70,089.68/96,720.37 = 39,872.15/x
  3. Step 3: Cross multiply
    70,089.68x = 96,720.37 × 39,872.15
  4. Step 4: Simplify right side
    70,089.68x = 3,856,449,392.34
  5. Step 5: Solve for x
    x = 3,856,449,392.34/70,089.68
  6. Step 6: Final answer
    x = 55,021.65

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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.