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Finding the Fourth Proportional to 158,268.80, 218,411.59 and 86,655.49

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Solution

The fourth proportional to 158,268.80, 218,411.59 and 86,655.49 is: 119,584.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,268.80 : 218,411.59 = 86,655.49 : x
  2. Step 2: Convert to fraction form
    158,268.80/218,411.59 = 86,655.49/x
  3. Step 3: Cross multiply
    158,268.80x = 218,411.59 × 86,655.49
  4. Step 4: Simplify right side
    158,268.80x = 18,926,563,353.13
  5. Step 5: Solve for x
    x = 18,926,563,353.13/158,268.80
  6. Step 6: Final answer
    x = 119,584.93

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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.