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Finding the Fourth Proportional to 145,849, 201,271.70 and 78,781

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Solution

The fourth proportional to 145,849, 201,271.70 and 78,781 is: 108,717.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,849 : 201,271.70 = 78,781 : x
  2. Step 2: Convert to fraction form
    145,849/201,271.70 = 78,781/x
  3. Step 3: Cross multiply
    145,849x = 201,271.70 × 78,781
  4. Step 4: Simplify right side
    145,849x = 15,856,385,797.70
  5. Step 5: Solve for x
    x = 15,856,385,797.70/145,849
  6. Step 6: Final answer
    x = 108,717.82

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