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Finding the Fourth Proportional to 86,435.82, 129,663.45 and 27,253.98

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Solution

The fourth proportional to 86,435.82, 129,663.45 and 27,253.98 is: 40,884.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,435.82 : 129,663.45 = 27,253.98 : x
  2. Step 2: Convert to fraction form
    86,435.82/129,663.45 = 27,253.98/x
  3. Step 3: Cross multiply
    86,435.82x = 129,663.45 × 27,253.98
  4. Step 4: Simplify right side
    86,435.82x = 3,533,845,073.03
  5. Step 5: Solve for x
    x = 3,533,845,073.03/86,435.82
  6. Step 6: Final answer
    x = 40,884.03

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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.