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Finding the Fourth Proportional to 158,273.75, 218,409.16 and 86,639.93

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Solution

The fourth proportional to 158,273.75, 218,409.16 and 86,639.93 is: 119,558.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,273.75 : 218,409.16 = 86,639.93 : x
  2. Step 2: Convert to fraction form
    158,273.75/218,409.16 = 86,639.93/x
  3. Step 3: Cross multiply
    158,273.75x = 218,409.16 × 86,639.93
  4. Step 4: Simplify right side
    158,273.75x = 18,922,954,006.60
  5. Step 5: Solve for x
    x = 18,922,954,006.60/158,273.75
  6. Step 6: Final answer
    x = 119,558.39

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1.5x scale

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.