Home / 138,400.12-190,996.14-77,971.42

Finding the Fourth Proportional to 138,400.12, 190,996.14 and 77,971.42

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Solution

The fourth proportional to 138,400.12, 190,996.14 and 77,971.42 is: 107,602.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,400.12 : 190,996.14 = 77,971.42 : x
  2. Step 2: Convert to fraction form
    138,400.12/190,996.14 = 77,971.42/x
  3. Step 3: Cross multiply
    138,400.12x = 190,996.14 × 77,971.42
  4. Step 4: Simplify right side
    138,400.12x = 14,892,240,250.32
  5. Step 5: Solve for x
    x = 14,892,240,250.32/138,400.12
  6. Step 6: Final answer
    x = 107,602.80

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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.