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Finding the Fourth Proportional to 158,269.68, 218,412.80 and 86,656.37

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Solution

The fourth proportional to 158,269.68, 218,412.80 and 86,656.37 is: 119,586.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,269.68 : 218,412.80 = 86,656.37 : x
  2. Step 2: Convert to fraction form
    158,269.68/218,412.80 = 86,656.37/x
  3. Step 3: Cross multiply
    158,269.68x = 218,412.80 × 86,656.37
  4. Step 4: Simplify right side
    158,269.68x = 18,926,858,884.19
  5. Step 5: Solve for x
    x = 18,926,858,884.19/158,269.68
  6. Step 6: Final answer
    x = 119,586.13

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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.