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Finding the Fourth Proportional to 158,145.72, 218,239.16 and 86,524.71

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Solution

The fourth proportional to 158,145.72, 218,239.16 and 86,524.71 is: 119,403.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,145.72 : 218,239.16 = 86,524.71 : x
  2. Step 2: Convert to fraction form
    158,145.72/218,239.16 = 86,524.71/x
  3. Step 3: Cross multiply
    158,145.72x = 218,239.16 × 86,524.71
  4. Step 4: Simplify right side
    158,145.72x = 18,883,079,597.02
  5. Step 5: Solve for x
    x = 18,883,079,597.02/158,145.72
  6. Step 6: Final answer
    x = 119,403.04

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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.