Home / 138,136.34-190,614.78-77,727.89

Finding the Fourth Proportional to 138,136.34, 190,614.78 and 77,727.89

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Solution

The fourth proportional to 138,136.34, 190,614.78 and 77,727.89 is: 107,256.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,136.34 : 190,614.78 = 77,727.89 : x
  2. Step 2: Convert to fraction form
    138,136.34/190,614.78 = 77,727.89/x
  3. Step 3: Cross multiply
    138,136.34x = 190,614.78 × 77,727.89
  4. Step 4: Simplify right side
    138,136.34x = 14,816,084,652.21
  5. Step 5: Solve for x
    x = 14,816,084,652.21/138,136.34
  6. Step 6: Final answer
    x = 107,256.97

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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.