Home / 77,815.45-107,818.99-76,133.89

Finding the Fourth Proportional to 77,815.45, 107,818.99 and 76,133.89

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Solution

The fourth proportional to 77,815.45, 107,818.99 and 76,133.89 is: 105,489.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,815.45 : 107,818.99 = 76,133.89 : x
  2. Step 2: Convert to fraction form
    77,815.45/107,818.99 = 76,133.89/x
  3. Step 3: Cross multiply
    77,815.45x = 107,818.99 × 76,133.89
  4. Step 4: Simplify right side
    77,815.45x = 8,208,679,124.57
  5. Step 5: Solve for x
    x = 8,208,679,124.57/77,815.45
  6. Step 6: Final answer
    x = 105,489.07

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.