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Finding the Fourth Proportional to 158,344.25, 218,506.73 and 86,722.74

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Solution

The fourth proportional to 158,344.25, 218,506.73 and 86,722.74 is: 119,672.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,344.25 : 218,506.73 = 86,722.74 : x
  2. Step 2: Convert to fraction form
    158,344.25/218,506.73 = 86,722.74/x
  3. Step 3: Cross multiply
    158,344.25x = 218,506.73 × 86,722.74
  4. Step 4: Simplify right side
    158,344.25x = 18,949,501,900.43
  5. Step 5: Solve for x
    x = 18,949,501,900.43/158,344.25
  6. Step 6: Final answer
    x = 119,672.82

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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.