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Finding the Fourth Proportional to 158,586.75, 218,829.60 and 86,947.92

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Solution

The fourth proportional to 158,586.75, 218,829.60 and 86,947.92 is: 119,977.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,586.75 : 218,829.60 = 86,947.92 : x
  2. Step 2: Convert to fraction form
    158,586.75/218,829.60 = 86,947.92/x
  3. Step 3: Cross multiply
    158,586.75x = 218,829.60 × 86,947.92
  4. Step 4: Simplify right side
    158,586.75x = 19,026,778,554.43
  5. Step 5: Solve for x
    x = 19,026,778,554.43/158,586.75
  6. Step 6: Final answer
    x = 119,977.10

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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.