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Finding the Fourth Proportional to 158,143.70, 218,238.83 and 86,523.50

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Solution

The fourth proportional to 158,143.70, 218,238.83 and 86,523.50 is: 119,402.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,143.70 : 218,238.83 = 86,523.50 : x
  2. Step 2: Convert to fraction form
    158,143.70/218,238.83 = 86,523.50/x
  3. Step 3: Cross multiply
    158,143.70x = 218,238.83 × 86,523.50
  4. Step 4: Simplify right side
    158,143.70x = 18,882,787,407.51
  5. Step 5: Solve for x
    x = 18,882,787,407.51/158,143.70
  6. Step 6: Final answer
    x = 119,402.72

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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.