Home / 123,628.57-170,534.33-78,916.57

Finding the Fourth Proportional to 123,628.57, 170,534.33 and 78,916.57

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Solution

The fourth proportional to 123,628.57, 170,534.33 and 78,916.57 is: 108,858.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,628.57 : 170,534.33 = 78,916.57 : x
  2. Step 2: Convert to fraction form
    123,628.57/170,534.33 = 78,916.57/x
  3. Step 3: Cross multiply
    123,628.57x = 170,534.33 × 78,916.57
  4. Step 4: Simplify right side
    123,628.57x = 13,457,983,865.87
  5. Step 5: Solve for x
    x = 13,457,983,865.87/123,628.57
  6. Step 6: Final answer
    x = 108,858.20

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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.