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Finding the Fourth Proportional to 76,115.40, 105,036.88 and 42,121.84

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Solution

The fourth proportional to 76,115.40, 105,036.88 and 42,121.84 is: 58,126.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,115.40 : 105,036.88 = 42,121.84 : x
  2. Step 2: Convert to fraction form
    76,115.40/105,036.88 = 42,121.84/x
  3. Step 3: Cross multiply
    76,115.40x = 105,036.88 × 42,121.84
  4. Step 4: Simplify right side
    76,115.40x = 4,424,346,653.46
  5. Step 5: Solve for x
    x = 4,424,346,653.46/76,115.40
  6. Step 6: Final answer
    x = 58,126.83

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