Home / 129,742.70-179,014.39-78,754.18

Finding the Fourth Proportional to 129,742.70, 179,014.39 and 78,754.18

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Solution

The fourth proportional to 129,742.70, 179,014.39 and 78,754.18 is: 108,662.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,742.70 : 179,014.39 = 78,754.18 : x
  2. Step 2: Convert to fraction form
    129,742.70/179,014.39 = 78,754.18/x
  3. Step 3: Cross multiply
    129,742.70x = 179,014.39 × 78,754.18
  4. Step 4: Simplify right side
    129,742.70x = 14,098,130,203.81
  5. Step 5: Solve for x
    x = 14,098,130,203.81/129,742.70
  6. Step 6: Final answer
    x = 108,662.22

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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.