Home / 156,989.09-216,649.05-85,373.30

Finding the Fourth Proportional to 156,989.09, 216,649.05 and 85,373.30

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Solution

The fourth proportional to 156,989.09, 216,649.05 and 85,373.30 is: 117,817.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,989.09 : 216,649.05 = 85,373.30 : x
  2. Step 2: Convert to fraction form
    156,989.09/216,649.05 = 85,373.30/x
  3. Step 3: Cross multiply
    156,989.09x = 216,649.05 × 85,373.30
  4. Step 4: Simplify right side
    156,989.09x = 18,496,044,340.37
  5. Step 5: Solve for x
    x = 18,496,044,340.37/156,989.09
  6. Step 6: Final answer
    x = 117,817.39

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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.