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Finding the Fourth Proportional to 258,363.84, 387,645.44 and 89,901.60

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Solution

The fourth proportional to 258,363.84, 387,645.44 and 89,901.60 is: 134,887.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,363.84 : 387,645.44 = 89,901.60 : x
  2. Step 2: Convert to fraction form
    258,363.84/387,645.44 = 89,901.60/x
  3. Step 3: Cross multiply
    258,363.84x = 387,645.44 × 89,901.60
  4. Step 4: Simplify right side
    258,363.84x = 34,849,945,288.70
  5. Step 5: Solve for x
    x = 34,849,945,288.70/258,363.84
  6. Step 6: Final answer
    x = 134,887.09

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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.