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Finding the Fourth Proportional to 128,401.70, 192,602.55 and 75,784.10

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Solution

The fourth proportional to 128,401.70, 192,602.55 and 75,784.10 is: 113,676.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,401.70 : 192,602.55 = 75,784.10 : x
  2. Step 2: Convert to fraction form
    128,401.70/192,602.55 = 75,784.10/x
  3. Step 3: Cross multiply
    128,401.70x = 192,602.55 × 75,784.10
  4. Step 4: Simplify right side
    128,401.70x = 14,596,210,909.46
  5. Step 5: Solve for x
    x = 14,596,210,909.46/128,401.70
  6. Step 6: Final answer
    x = 113,676.15

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