Home / 129,938.57-179,313.31-72,578.69

Finding the Fourth Proportional to 129,938.57, 179,313.31 and 72,578.69

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Solution

The fourth proportional to 129,938.57, 179,313.31 and 72,578.69 is: 100,157.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,938.57 : 179,313.31 = 72,578.69 : x
  2. Step 2: Convert to fraction form
    129,938.57/179,313.31 = 72,578.69/x
  3. Step 3: Cross multiply
    129,938.57x = 179,313.31 × 72,578.69
  4. Step 4: Simplify right side
    129,938.57x = 13,014,325,510.26
  5. Step 5: Solve for x
    x = 13,014,325,510.26/129,938.57
  6. Step 6: Final answer
    x = 100,157.52

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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.