Home / 129,633.70-178,895.21-72,276.63

Finding the Fourth Proportional to 129,633.70, 178,895.21 and 72,276.63

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Solution

The fourth proportional to 129,633.70, 178,895.21 and 72,276.63 is: 99,742.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,633.70 : 178,895.21 = 72,276.63 : x
  2. Step 2: Convert to fraction form
    129,633.70/178,895.21 = 72,276.63/x
  3. Step 3: Cross multiply
    129,633.70x = 178,895.21 × 72,276.63
  4. Step 4: Simplify right side
    129,633.70x = 12,929,942,901.94
  5. Step 5: Solve for x
    x = 12,929,942,901.94/129,633.70
  6. Step 6: Final answer
    x = 99,742.14

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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.