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Finding the Fourth Proportional to 217,407.48, 300,017.64 and 121,912.08

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Solution

The fourth proportional to 217,407.48, 300,017.64 and 121,912.08 is: 168,236.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,407.48 : 300,017.64 = 121,912.08 : x
  2. Step 2: Convert to fraction form
    217,407.48/300,017.64 = 121,912.08/x
  3. Step 3: Cross multiply
    217,407.48x = 300,017.64 × 121,912.08
  4. Step 4: Simplify right side
    217,407.48x = 36,575,774,529.09
  5. Step 5: Solve for x
    x = 36,575,774,529.09/217,407.48
  6. Step 6: Final answer
    x = 168,236.04

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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.