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Finding the Fourth Proportional to 255,709.80, 383,604.12 and 87,190.72

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Solution

The fourth proportional to 255,709.80, 383,604.12 and 87,190.72 is: 130,799.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,709.80 : 383,604.12 = 87,190.72 : x
  2. Step 2: Convert to fraction form
    255,709.80/383,604.12 = 87,190.72/x
  3. Step 3: Cross multiply
    255,709.80x = 383,604.12 × 87,190.72
  4. Step 4: Simplify right side
    255,709.80x = 33,446,719,417.77
  5. Step 5: Solve for x
    x = 33,446,719,417.77/255,709.80
  6. Step 6: Final answer
    x = 130,799.52

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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.