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Finding the Fourth Proportional to 217,440.68, 300,070.31 and 121,945.32

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Solution

The fourth proportional to 217,440.68, 300,070.31 and 121,945.32 is: 168,285.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,440.68 : 300,070.31 = 121,945.32 : x
  2. Step 2: Convert to fraction form
    217,440.68/300,070.31 = 121,945.32/x
  3. Step 3: Cross multiply
    217,440.68x = 300,070.31 × 121,945.32
  4. Step 4: Simplify right side
    217,440.68x = 36,592,169,365.72
  5. Step 5: Solve for x
    x = 36,592,169,365.72/217,440.68
  6. Step 6: Final answer
    x = 168,285.76

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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.