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Finding the Fourth Proportional to 270,171.53, 405,197.58 and 78,004.21

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Solution

The fourth proportional to 270,171.53, 405,197.58 and 78,004.21 is: 116,989.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,171.53 : 405,197.58 = 78,004.21 : x
  2. Step 2: Convert to fraction form
    270,171.53/405,197.58 = 78,004.21/x
  3. Step 3: Cross multiply
    270,171.53x = 405,197.58 × 78,004.21
  4. Step 4: Simplify right side
    270,171.53x = 31,607,117,121.81
  5. Step 5: Solve for x
    x = 31,607,117,121.81/270,171.53
  6. Step 6: Final answer
    x = 116,989.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.