Home / 129,046.67-178,012.23-81,216.98

Finding the Fourth Proportional to 129,046.67, 178,012.23 and 81,216.98

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Solution

The fourth proportional to 129,046.67, 178,012.23 and 81,216.98 is: 112,034.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,046.67 : 178,012.23 = 81,216.98 : x
  2. Step 2: Convert to fraction form
    129,046.67/178,012.23 = 81,216.98/x
  3. Step 3: Cross multiply
    129,046.67x = 178,012.23 × 81,216.98
  4. Step 4: Simplify right side
    129,046.67x = 14,457,615,653.43
  5. Step 5: Solve for x
    x = 14,457,615,653.43/129,046.67
  6. Step 6: Final answer
    x = 112,034.01

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1.5x scale

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.