Home / 255,767.10-383,679.45-78,272.70

Finding the Fourth Proportional to 255,767.10, 383,679.45 and 78,272.70

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Solution

The fourth proportional to 255,767.10, 383,679.45 and 78,272.70 is: 117,417.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,767.10 : 383,679.45 = 78,272.70 : x
  2. Step 2: Convert to fraction form
    255,767.10/383,679.45 = 78,272.70/x
  3. Step 3: Cross multiply
    255,767.10x = 383,679.45 × 78,272.70
  4. Step 4: Simplify right side
    255,767.10x = 30,031,626,486.02
  5. Step 5: Solve for x
    x = 30,031,626,486.02/255,767.10
  6. Step 6: Final answer
    x = 117,417.86

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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.