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Finding the Fourth Proportional to 86,080.39, 128,881.08 and 43,869.46

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Solution

The fourth proportional to 86,080.39, 128,881.08 and 43,869.46 is: 65,682.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,080.39 : 128,881.08 = 43,869.46 : x
  2. Step 2: Convert to fraction form
    86,080.39/128,881.08 = 43,869.46/x
  3. Step 3: Cross multiply
    86,080.39x = 128,881.08 × 43,869.46
  4. Step 4: Simplify right side
    86,080.39x = 5,653,943,383.82
  5. Step 5: Solve for x
    x = 5,653,943,383.82/86,080.39
  6. Step 6: Final answer
    x = 65,682.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.