Home / 75,409.58-113,128.95-28,658.81

Finding the Fourth Proportional to 75,409.58, 113,128.95 and 28,658.81

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Solution

The fourth proportional to 75,409.58, 113,128.95 and 28,658.81 is: 42,993.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,409.58 : 113,128.95 = 28,658.81 : x
  2. Step 2: Convert to fraction form
    75,409.58/113,128.95 = 28,658.81/x
  3. Step 3: Cross multiply
    75,409.58x = 113,128.95 × 28,658.81
  4. Step 4: Simplify right side
    75,409.58x = 3,242,141,473.84
  5. Step 5: Solve for x
    x = 3,242,141,473.84/75,409.58
  6. Step 6: Final answer
    x = 42,993.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.