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Finding the Fourth Proportional to 86,437.94, 129,669.05 and 27,278.37

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Solution

The fourth proportional to 86,437.94, 129,669.05 and 27,278.37 is: 40,921.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,437.94 : 129,669.05 = 27,278.37 : x
  2. Step 2: Convert to fraction form
    86,437.94/129,669.05 = 27,278.37/x
  3. Step 3: Cross multiply
    86,437.94x = 129,669.05 × 27,278.37
  4. Step 4: Simplify right side
    86,437.94x = 3,537,160,391.64
  5. Step 5: Solve for x
    x = 3,537,160,391.64/86,437.94
  6. Step 6: Final answer
    x = 40,921.39

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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.