Home / 78,047.28-107,757.99-51,235.38

Finding the Fourth Proportional to 78,047.28, 107,757.99 and 51,235.38

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Solution

The fourth proportional to 78,047.28, 107,757.99 and 51,235.38 is: 70,739.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,047.28 : 107,757.99 = 51,235.38 : x
  2. Step 2: Convert to fraction form
    78,047.28/107,757.99 = 51,235.38/x
  3. Step 3: Cross multiply
    78,047.28x = 107,757.99 × 51,235.38
  4. Step 4: Simplify right side
    78,047.28x = 5,521,021,565.69
  5. Step 5: Solve for x
    x = 5,521,021,565.69/78,047.28
  6. Step 6: Final answer
    x = 70,739.45

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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.