Home / 129,576.92-178,821.63-72,216.32

Finding the Fourth Proportional to 129,576.92, 178,821.63 and 72,216.32

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Solution

The fourth proportional to 129,576.92, 178,821.63 and 72,216.32 is: 99,661.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,576.92 : 178,821.63 = 72,216.32 : x
  2. Step 2: Convert to fraction form
    129,576.92/178,821.63 = 72,216.32/x
  3. Step 3: Cross multiply
    129,576.92x = 178,821.63 × 72,216.32
  4. Step 4: Simplify right side
    129,576.92x = 12,913,839,160.89
  5. Step 5: Solve for x
    x = 12,913,839,160.89/129,576.92
  6. Step 6: Final answer
    x = 99,661.57

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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.