Home / 129,806.92-179,142.55-72,457.40

Finding the Fourth Proportional to 129,806.92, 179,142.55 and 72,457.40

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Solution

The fourth proportional to 129,806.92, 179,142.55 and 72,457.40 is: 99,996.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,806.92 : 179,142.55 = 72,457.40 : x
  2. Step 2: Convert to fraction form
    129,806.92/179,142.55 = 72,457.40/x
  3. Step 3: Cross multiply
    129,806.92x = 179,142.55 × 72,457.40
  4. Step 4: Simplify right side
    129,806.92x = 12,980,203,040.08
  5. Step 5: Solve for x
    x = 12,980,203,040.08/129,806.92
  6. Step 6: Final answer
    x = 99,996.24

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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.