Home / 123,717.23-170,731.76-67,128.60

Finding the Fourth Proportional to 123,717.23, 170,731.76 and 67,128.60

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Solution

The fourth proportional to 123,717.23, 170,731.76 and 67,128.60 is: 92,638.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,717.23 : 170,731.76 = 67,128.60 : x
  2. Step 2: Convert to fraction form
    123,717.23/170,731.76 = 67,128.60/x
  3. Step 3: Cross multiply
    123,717.23x = 170,731.76 × 67,128.60
  4. Step 4: Simplify right side
    123,717.23x = 11,460,983,688.69
  5. Step 5: Solve for x
    x = 11,460,983,688.69/123,717.23
  6. Step 6: Final answer
    x = 92,638.54

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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.