Home / 137,820.48-190,213.08-84,136.80

Finding the Fourth Proportional to 137,820.48, 190,213.08 and 84,136.80

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Solution

The fourth proportional to 137,820.48, 190,213.08 and 84,136.80 is: 116,121.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,820.48 : 190,213.08 = 84,136.80 : x
  2. Step 2: Convert to fraction form
    137,820.48/190,213.08 = 84,136.80/x
  3. Step 3: Cross multiply
    137,820.48x = 190,213.08 × 84,136.80
  4. Step 4: Simplify right side
    137,820.48x = 16,003,919,869.34
  5. Step 5: Solve for x
    x = 16,003,919,869.34/137,820.48
  6. Step 6: Final answer
    x = 116,121.49

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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.