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Finding the Fourth Proportional to 258,451.65, 387,643.44 and 89,936.01

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Solution

The fourth proportional to 258,451.65, 387,643.44 and 89,936.01 is: 134,892.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,451.65 : 387,643.44 = 89,936.01 : x
  2. Step 2: Convert to fraction form
    258,451.65/387,643.44 = 89,936.01/x
  3. Step 3: Cross multiply
    258,451.65x = 387,643.44 × 89,936.01
  4. Step 4: Simplify right side
    258,451.65x = 34,863,104,296.27
  5. Step 5: Solve for x
    x = 34,863,104,296.27/258,451.65
  6. Step 6: Final answer
    x = 134,892.17

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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.