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Finding the Fourth Proportional to 47,268, 65,230.65 and 30,530.16

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Solution

The fourth proportional to 47,268, 65,230.65 and 30,530.16 is: 42,132.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,268 : 65,230.65 = 30,530.16 : x
  2. Step 2: Convert to fraction form
    47,268/65,230.65 = 30,530.16/x
  3. Step 3: Cross multiply
    47,268x = 65,230.65 × 30,530.16
  4. Step 4: Simplify right side
    47,268x = 1,991,502,181.40
  5. Step 5: Solve for x
    x = 1,991,502,181.40/47,268
  6. Step 6: Final answer
    x = 42,132.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.