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Finding the Fourth Proportional to 158,485.59, 218,708.81 and 86,865.44

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Solution

The fourth proportional to 158,485.59, 218,708.81 and 86,865.44 is: 119,873.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,485.59 : 218,708.81 = 86,865.44 : x
  2. Step 2: Convert to fraction form
    158,485.59/218,708.81 = 86,865.44/x
  3. Step 3: Cross multiply
    158,485.59x = 218,708.81 × 86,865.44
  4. Step 4: Simplify right side
    158,485.59x = 18,998,236,425.52
  5. Step 5: Solve for x
    x = 18,998,236,425.52/158,485.59
  6. Step 6: Final answer
    x = 119,873.59

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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.