Home / 138,142.58-190,636.46-77,713.26

Finding the Fourth Proportional to 138,142.58, 190,636.46 and 77,713.26

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Solution

The fourth proportional to 138,142.58, 190,636.46 and 77,713.26 is: 107,244.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,142.58 : 190,636.46 = 77,713.26 : x
  2. Step 2: Convert to fraction form
    138,142.58/190,636.46 = 77,713.26/x
  3. Step 3: Cross multiply
    138,142.58x = 190,636.46 × 77,713.26
  4. Step 4: Simplify right side
    138,142.58x = 14,814,980,781.46
  5. Step 5: Solve for x
    x = 14,814,980,781.46/138,142.58
  6. Step 6: Final answer
    x = 107,244.13

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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.