Home / 129,938.47-179,313.19-72,578.61

Finding the Fourth Proportional to 129,938.47, 179,313.19 and 72,578.61

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Solution

The fourth proportional to 129,938.47, 179,313.19 and 72,578.61 is: 100,157.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,938.47 : 179,313.19 = 72,578.61 : x
  2. Step 2: Convert to fraction form
    129,938.47/179,313.19 = 72,578.61/x
  3. Step 3: Cross multiply
    129,938.47x = 179,313.19 × 72,578.61
  4. Step 4: Simplify right side
    129,938.47x = 13,014,302,084.87
  5. Step 5: Solve for x
    x = 13,014,302,084.87/129,938.47
  6. Step 6: Final answer
    x = 100,157.42

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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.