Home / 129,928.42-179,289.54-72,559.77

Finding the Fourth Proportional to 129,928.42, 179,289.54 and 72,559.77

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Solution

The fourth proportional to 129,928.42, 179,289.54 and 72,559.77 is: 100,125.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,928.42 : 179,289.54 = 72,559.77 : x
  2. Step 2: Convert to fraction form
    129,928.42/179,289.54 = 72,559.77/x
  3. Step 3: Cross multiply
    129,928.42x = 179,289.54 × 72,559.77
  4. Step 4: Simplify right side
    129,928.42x = 13,009,208,919.20
  5. Step 5: Solve for x
    x = 13,009,208,919.20/129,928.42
  6. Step 6: Final answer
    x = 100,125.97

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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.