Home / 156,828.80-216,424.71-85,208.78

Finding the Fourth Proportional to 156,828.80, 216,424.71 and 85,208.78

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Solution

The fourth proportional to 156,828.80, 216,424.71 and 85,208.78 is: 117,588.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,828.80 : 216,424.71 = 85,208.78 : x
  2. Step 2: Convert to fraction form
    156,828.80/216,424.71 = 85,208.78/x
  3. Step 3: Cross multiply
    156,828.80x = 216,424.71 × 85,208.78
  4. Step 4: Simplify right side
    156,828.80x = 18,441,285,500.95
  5. Step 5: Solve for x
    x = 18,441,285,500.95/156,828.80
  6. Step 6: Final answer
    x = 117,588.64

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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.