Home / 100,828.15-139,128.67-66,783.85

Finding the Fourth Proportional to 100,828.15, 139,128.67 and 66,783.85

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Solution

The fourth proportional to 100,828.15, 139,128.67 and 66,783.85 is: 92,152.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,828.15 : 139,128.67 = 66,783.85 : x
  2. Step 2: Convert to fraction form
    100,828.15/139,128.67 = 66,783.85/x
  3. Step 3: Cross multiply
    100,828.15x = 139,128.67 × 66,783.85
  4. Step 4: Simplify right side
    100,828.15x = 9,291,548,227.98
  5. Step 5: Solve for x
    x = 9,291,548,227.98/100,828.15
  6. Step 6: Final answer
    x = 92,152.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.