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Finding the Fourth Proportional to 255,904.49, 383,915.80 and 75,985.91

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Solution

The fourth proportional to 255,904.49, 383,915.80 and 75,985.91 is: 113,996.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,904.49 : 383,915.80 = 75,985.91 : x
  2. Step 2: Convert to fraction form
    255,904.49/383,915.80 = 75,985.91/x
  3. Step 3: Cross multiply
    255,904.49x = 383,915.80 × 75,985.91
  4. Step 4: Simplify right side
    255,904.49x = 29,172,189,316.83
  5. Step 5: Solve for x
    x = 29,172,189,316.83/255,904.49
  6. Step 6: Final answer
    x = 113,996.40

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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.