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Finding the Fourth Proportional to 310,285.21, 465,454.53 and 85,645.68

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Solution

The fourth proportional to 310,285.21, 465,454.53 and 85,645.68 is: 128,475.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,285.21 : 465,454.53 = 85,645.68 : x
  2. Step 2: Convert to fraction form
    310,285.21/465,454.53 = 85,645.68/x
  3. Step 3: Cross multiply
    310,285.21x = 465,454.53 × 85,645.68
  4. Step 4: Simplify right side
    310,285.21x = 39,864,169,730.93
  5. Step 5: Solve for x
    x = 39,864,169,730.93/310,285.21
  6. Step 6: Final answer
    x = 128,475.89

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