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Finding the Fourth Proportional to 158,219.80, 218,343.40 and 86,600.21

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Solution

The fourth proportional to 158,219.80, 218,343.40 and 86,600.21 is: 119,508.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,219.80 : 218,343.40 = 86,600.21 : x
  2. Step 2: Convert to fraction form
    158,219.80/218,343.40 = 86,600.21/x
  3. Step 3: Cross multiply
    158,219.80x = 218,343.40 × 86,600.21
  4. Step 4: Simplify right side
    158,219.80x = 18,908,582,983.90
  5. Step 5: Solve for x
    x = 18,908,582,983.90/158,219.80
  6. Step 6: Final answer
    x = 119,508.33

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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.