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Finding the Fourth Proportional to 103,638.06, 155,459.72 and 77,508.68

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Solution

The fourth proportional to 103,638.06, 155,459.72 and 77,508.68 is: 116,264.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,638.06 : 155,459.72 = 77,508.68 : x
  2. Step 2: Convert to fraction form
    103,638.06/155,459.72 = 77,508.68/x
  3. Step 3: Cross multiply
    103,638.06x = 155,459.72 × 77,508.68
  4. Step 4: Simplify right side
    103,638.06x = 12,049,477,690.37
  5. Step 5: Solve for x
    x = 12,049,477,690.37/103,638.06
  6. Step 6: Final answer
    x = 116,264.99

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