Home / 76,851.72-105,934.18-57,703.86

Finding the Fourth Proportional to 76,851.72, 105,934.18 and 57,703.86

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Solution

The fourth proportional to 76,851.72, 105,934.18 and 57,703.86 is: 79,540.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,851.72 : 105,934.18 = 57,703.86 : x
  2. Step 2: Convert to fraction form
    76,851.72/105,934.18 = 57,703.86/x
  3. Step 3: Cross multiply
    76,851.72x = 105,934.18 × 57,703.86
  4. Step 4: Simplify right side
    76,851.72x = 6,112,811,091.93
  5. Step 5: Solve for x
    x = 6,112,811,091.93/76,851.72
  6. Step 6: Final answer
    x = 79,540.33

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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.