Home / 76,521.72-105,476.16-57,107.64

Finding the Fourth Proportional to 76,521.72, 105,476.16 and 57,107.64

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Solution

The fourth proportional to 76,521.72, 105,476.16 and 57,107.64 is: 78,716.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,521.72 : 105,476.16 = 57,107.64 : x
  2. Step 2: Convert to fraction form
    76,521.72/105,476.16 = 57,107.64/x
  3. Step 3: Cross multiply
    76,521.72x = 105,476.16 × 57,107.64
  4. Step 4: Simplify right side
    76,521.72x = 6,023,494,573.86
  5. Step 5: Solve for x
    x = 6,023,494,573.86/76,521.72
  6. Step 6: Final answer
    x = 78,716.14

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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.