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Finding the Fourth Proportional to 158,272.43, 218,416.59 and 86,659.12

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Solution

The fourth proportional to 158,272.43, 218,416.59 and 86,659.12 is: 119,589.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,272.43 : 218,416.59 = 86,659.12 : x
  2. Step 2: Convert to fraction form
    158,272.43/218,416.59 = 86,659.12/x
  3. Step 3: Cross multiply
    158,272.43x = 218,416.59 × 86,659.12
  4. Step 4: Simplify right side
    158,272.43x = 18,927,789,482.80
  5. Step 5: Solve for x
    x = 18,927,789,482.80/158,272.43
  6. Step 6: Final answer
    x = 119,589.93

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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.