Home / 138,166.51-190,656.18-77,735.82

Finding the Fourth Proportional to 138,166.51, 190,656.18 and 77,735.82

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Solution

The fourth proportional to 138,166.51, 190,656.18 and 77,735.82 is: 107,267.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,166.51 : 190,656.18 = 77,735.82 : x
  2. Step 2: Convert to fraction form
    138,166.51/190,656.18 = 77,735.82/x
  3. Step 3: Cross multiply
    138,166.51x = 190,656.18 × 77,735.82
  4. Step 4: Simplify right side
    138,166.51x = 14,820,814,101.69
  5. Step 5: Solve for x
    x = 14,820,814,101.69/138,166.51
  6. Step 6: Final answer
    x = 107,267.78

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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.