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Finding the Fourth Proportional to 255,690.59, 383,551.01 and 78,209.87

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Solution

The fourth proportional to 255,690.59, 383,551.01 and 78,209.87 is: 117,319.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,690.59 : 383,551.01 = 78,209.87 : x
  2. Step 2: Convert to fraction form
    255,690.59/383,551.01 = 78,209.87/x
  3. Step 3: Cross multiply
    255,690.59x = 383,551.01 × 78,209.87
  4. Step 4: Simplify right side
    255,690.59x = 29,997,474,239.42
  5. Step 5: Solve for x
    x = 29,997,474,239.42/255,690.59
  6. Step 6: Final answer
    x = 117,319.43

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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.