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Finding the Fourth Proportional to 86,187.97, 129,249.95 and 30,013.66

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Solution

The fourth proportional to 86,187.97, 129,249.95 and 30,013.66 is: 45,009.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,187.97 : 129,249.95 = 30,013.66 : x
  2. Step 2: Convert to fraction form
    86,187.97/129,249.95 = 30,013.66/x
  3. Step 3: Cross multiply
    86,187.97x = 129,249.95 × 30,013.66
  4. Step 4: Simplify right side
    86,187.97x = 3,879,264,054.32
  5. Step 5: Solve for x
    x = 3,879,264,054.32/86,187.97
  6. Step 6: Final answer
    x = 45,009.34

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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.