Home / 77,690.11-107,618.40-76,115.47

Finding the Fourth Proportional to 77,690.11, 107,618.40 and 76,115.47

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Solution

The fourth proportional to 77,690.11, 107,618.40 and 76,115.47 is: 105,437.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,690.11 : 107,618.40 = 76,115.47 : x
  2. Step 2: Convert to fraction form
    77,690.11/107,618.40 = 76,115.47/x
  3. Step 3: Cross multiply
    77,690.11x = 107,618.40 × 76,115.47
  4. Step 4: Simplify right side
    77,690.11x = 8,191,425,096.65
  5. Step 5: Solve for x
    x = 8,191,425,096.65/77,690.11
  6. Step 6: Final answer
    x = 105,437.17

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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.