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Finding the Fourth Proportional to 158,493.51, 218,713.37 and 86,860.76

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Solution

The fourth proportional to 158,493.51, 218,713.37 and 86,860.76 is: 119,863.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,493.51 : 218,713.37 = 86,860.76 : x
  2. Step 2: Convert to fraction form
    158,493.51/218,713.37 = 86,860.76/x
  3. Step 3: Cross multiply
    158,493.51x = 218,713.37 × 86,860.76
  4. Step 4: Simplify right side
    158,493.51x = 18,997,608,012.49
  5. Step 5: Solve for x
    x = 18,997,608,012.49/158,493.51
  6. Step 6: Final answer
    x = 119,863.63

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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.