Home / 255,705.13-383,573.09-78,213.69

Finding the Fourth Proportional to 255,705.13, 383,573.09 and 78,213.69

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Solution

The fourth proportional to 255,705.13, 383,573.09 and 78,213.69 is: 117,325.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,705.13 : 383,573.09 = 78,213.69 : x
  2. Step 2: Convert to fraction form
    255,705.13/383,573.09 = 78,213.69/x
  3. Step 3: Cross multiply
    255,705.13x = 383,573.09 × 78,213.69
  4. Step 4: Simplify right side
    255,705.13x = 30,000,666,753.60
  5. Step 5: Solve for x
    x = 30,000,666,753.60/255,705.13
  6. Step 6: Final answer
    x = 117,325.24

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1.5x scale

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.