Home / 255,919.83-383,935.91-78,440.19

Finding the Fourth Proportional to 255,919.83, 383,935.91 and 78,440.19

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Solution

The fourth proportional to 255,919.83, 383,935.91 and 78,440.19 is: 117,677.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,919.83 : 383,935.91 = 78,440.19 : x
  2. Step 2: Convert to fraction form
    255,919.83/383,935.91 = 78,440.19/x
  3. Step 3: Cross multiply
    255,919.83x = 383,935.91 × 78,440.19
  4. Step 4: Simplify right side
    255,919.83x = 30,116,005,336.02
  5. Step 5: Solve for x
    x = 30,116,005,336.02/255,919.83
  6. Step 6: Final answer
    x = 117,677.50

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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.