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Finding the Fourth Proportional to 70,850.89, 106,212.75 and 64,687.63

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Solution

The fourth proportional to 70,850.89, 106,212.75 and 64,687.63 is: 96,973.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,850.89 : 106,212.75 = 64,687.63 : x
  2. Step 2: Convert to fraction form
    70,850.89/106,212.75 = 64,687.63/x
  3. Step 3: Cross multiply
    70,850.89x = 106,212.75 × 64,687.63
  4. Step 4: Simplify right side
    70,850.89x = 6,870,651,073.28
  5. Step 5: Solve for x
    x = 6,870,651,073.28/70,850.89
  6. Step 6: Final answer
    x = 96,973.39

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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.