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Finding the Fourth Proportional to 158,143.64, 218,243.67 and 86,523.66

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Solution

The fourth proportional to 158,143.64, 218,243.67 and 86,523.66 is: 119,405.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,143.64 : 218,243.67 = 86,523.66 : x
  2. Step 2: Convert to fraction form
    158,143.64/218,243.67 = 86,523.66/x
  3. Step 3: Cross multiply
    158,143.64x = 218,243.67 × 86,523.66
  4. Step 4: Simplify right side
    158,143.64x = 18,883,241,100.23
  5. Step 5: Solve for x
    x = 18,883,241,100.23/158,143.64
  6. Step 6: Final answer
    x = 119,405.63

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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.