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Finding the Fourth Proportional to 158,426.89, 218,629.05 and 86,809.63

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Solution

The fourth proportional to 158,426.89, 218,629.05 and 86,809.63 is: 119,797.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,426.89 : 218,629.05 = 86,809.63 : x
  2. Step 2: Convert to fraction form
    158,426.89/218,629.05 = 86,809.63/x
  3. Step 3: Cross multiply
    158,426.89x = 218,629.05 × 86,809.63
  4. Step 4: Simplify right side
    158,426.89x = 18,979,106,937.75
  5. Step 5: Solve for x
    x = 18,979,106,937.75/158,426.89
  6. Step 6: Final answer
    x = 119,797.26

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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.