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Finding the Fourth Proportional to 307,071.48, 423,789.81 and 171,127.56

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Solution

The fourth proportional to 307,071.48, 423,789.81 and 171,127.56 is: 236,173.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,071.48 : 423,789.81 = 171,127.56 : x
  2. Step 2: Convert to fraction form
    307,071.48/423,789.81 = 171,127.56/x
  3. Step 3: Cross multiply
    307,071.48x = 423,789.81 × 171,127.56
  4. Step 4: Simplify right side
    307,071.48x = 72,522,116,138.16
  5. Step 5: Solve for x
    x = 72,522,116,138.16/307,071.48
  6. Step 6: Final answer
    x = 236,173.40

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1.5x scale

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.