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Finding the Fourth Proportional to 158,696.60, 218,993.98 and 87,074.84

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Solution

The fourth proportional to 158,696.60, 218,993.98 and 87,074.84 is: 120,159.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,696.60 : 218,993.98 = 87,074.84 : x
  2. Step 2: Convert to fraction form
    158,696.60/218,993.98 = 87,074.84/x
  3. Step 3: Cross multiply
    158,696.60x = 218,993.98 × 87,074.84
  4. Step 4: Simplify right side
    158,696.60x = 19,068,865,769.46
  5. Step 5: Solve for x
    x = 19,068,865,769.46/158,696.60
  6. Step 6: Final answer
    x = 120,159.26

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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.