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Finding the Fourth Proportional to 69,995.77, 96,591.75 and 39,780.56

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Solution

The fourth proportional to 69,995.77, 96,591.75 and 39,780.56 is: 54,895.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,995.77 : 96,591.75 = 39,780.56 : x
  2. Step 2: Convert to fraction form
    69,995.77/96,591.75 = 39,780.56/x
  3. Step 3: Cross multiply
    69,995.77x = 96,591.75 × 39,780.56
  4. Step 4: Simplify right side
    69,995.77x = 3,842,473,906.38
  5. Step 5: Solve for x
    x = 3,842,473,906.38/69,995.77
  6. Step 6: Final answer
    x = 54,895.80

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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.