Home / 280,682.28-421,051.77-91,134.72

Finding the Fourth Proportional to 280,682.28, 421,051.77 and 91,134.72

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Solution

The fourth proportional to 280,682.28, 421,051.77 and 91,134.72 is: 136,711.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,682.28 : 421,051.77 = 91,134.72 : x
  2. Step 2: Convert to fraction form
    280,682.28/421,051.77 = 91,134.72/x
  3. Step 3: Cross multiply
    280,682.28x = 421,051.77 × 91,134.72
  4. Step 4: Simplify right side
    280,682.28x = 38,372,435,164.45
  5. Step 5: Solve for x
    x = 38,372,435,164.45/280,682.28
  6. Step 6: Final answer
    x = 136,711.28

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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.