Home / 129,725.48-179,021.40-73,136.72

Finding the Fourth Proportional to 129,725.48, 179,021.40 and 73,136.72

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Solution

The fourth proportional to 129,725.48, 179,021.40 and 73,136.72 is: 100,928.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,725.48 : 179,021.40 = 73,136.72 : x
  2. Step 2: Convert to fraction form
    129,725.48/179,021.40 = 73,136.72/x
  3. Step 3: Cross multiply
    129,725.48x = 179,021.40 × 73,136.72
  4. Step 4: Simplify right side
    129,725.48x = 13,093,038,005.81
  5. Step 5: Solve for x
    x = 13,093,038,005.81/129,725.48
  6. Step 6: Final answer
    x = 100,928.81

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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.