Home / 217,418,638.51-325,716,466.80-128,521,063.54

Finding the Fourth Proportional to 217,418,638.51, 325,716,466.80 and 128,521,063.54

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Solution

The fourth proportional to 217,418,638.51, 325,716,466.80 and 128,521,063.54 is: 192,538,353.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,418,638.51 : 325,716,466.80 = 128,521,063.54 : x
  2. Step 2: Convert to fraction form
    217,418,638.51/325,716,466.80 = 128,521,063.54/x
  3. Step 3: Cross multiply
    217,418,638.51x = 325,716,466.80 × 128,521,063.54
  4. Step 4: Simplify right side
    217,418,638.51x = 41,861,426,725,627,104
  5. Step 5: Solve for x
    x = 41,861,426,725,627,104/217,418,638.51
  6. Step 6: Final answer
    x = 192,538,353.71

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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.