Home / 255,715.40-383,511.51-78,223.95

Finding the Fourth Proportional to 255,715.40, 383,511.51 and 78,223.95

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Solution

The fourth proportional to 255,715.40, 383,511.51 and 78,223.95 is: 117,317.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,715.40 : 383,511.51 = 78,223.95 : x
  2. Step 2: Convert to fraction form
    255,715.40/383,511.51 = 78,223.95/x
  3. Step 3: Cross multiply
    255,715.40x = 383,511.51 × 78,223.95
  4. Step 4: Simplify right side
    255,715.40x = 29,999,785,182.66
  5. Step 5: Solve for x
    x = 29,999,785,182.66/255,715.40
  6. Step 6: Final answer
    x = 117,317.08

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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.