Home / 138,142.57-190,636.47-77,713.26

Finding the Fourth Proportional to 138,142.57, 190,636.47 and 77,713.26

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Solution

The fourth proportional to 138,142.57, 190,636.47 and 77,713.26 is: 107,244.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,142.57 : 190,636.47 = 77,713.26 : x
  2. Step 2: Convert to fraction form
    138,142.57/190,636.47 = 77,713.26/x
  3. Step 3: Cross multiply
    138,142.57x = 190,636.47 × 77,713.26
  4. Step 4: Simplify right side
    138,142.57x = 14,814,981,558.59
  5. Step 5: Solve for x
    x = 14,814,981,558.59/138,142.57
  6. Step 6: Final answer
    x = 107,244.14

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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.