Home / 138,141.32-190,634.75-77,712.01

Finding the Fourth Proportional to 138,141.32, 190,634.75 and 77,712.01

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Solution

The fourth proportional to 138,141.32, 190,634.75 and 77,712.01 is: 107,242.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,141.32 : 190,634.75 = 77,712.01 : x
  2. Step 2: Convert to fraction form
    138,141.32/190,634.75 = 77,712.01/x
  3. Step 3: Cross multiply
    138,141.32x = 190,634.75 × 77,712.01
  4. Step 4: Simplify right side
    138,141.32x = 14,814,608,733.20
  5. Step 5: Solve for x
    x = 14,814,608,733.20/138,141.32
  6. Step 6: Final answer
    x = 107,242.41

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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.