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Finding the Fourth Proportional to 158,492.94, 218,721.77 and 86,874.36

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Solution

The fourth proportional to 158,492.94, 218,721.77 and 86,874.36 is: 119,887.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,492.94 : 218,721.77 = 86,874.36 : x
  2. Step 2: Convert to fraction form
    158,492.94/218,721.77 = 86,874.36/x
  3. Step 3: Cross multiply
    158,492.94x = 218,721.77 × 86,874.36
  4. Step 4: Simplify right side
    158,492.94x = 19,001,313,786.82
  5. Step 5: Solve for x
    x = 19,001,313,786.82/158,492.94
  6. Step 6: Final answer
    x = 119,887.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.