Home / 129,450.63-178,549.83-86,408.43

Finding the Fourth Proportional to 129,450.63, 178,549.83 and 86,408.43

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Solution

The fourth proportional to 129,450.63, 178,549.83 and 86,408.43 is: 119,182.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,450.63 : 178,549.83 = 86,408.43 : x
  2. Step 2: Convert to fraction form
    129,450.63/178,549.83 = 86,408.43/x
  3. Step 3: Cross multiply
    129,450.63x = 178,549.83 × 86,408.43
  4. Step 4: Simplify right side
    129,450.63x = 15,428,210,487.07
  5. Step 5: Solve for x
    x = 15,428,210,487.07/129,450.63
  6. Step 6: Final answer
    x = 119,182.20

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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.