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Finding the Fourth Proportional to 158,268.93, 218,411.76 and 86,655.61

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Solution

The fourth proportional to 158,268.93, 218,411.76 and 86,655.61 is: 119,585.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,268.93 : 218,411.76 = 86,655.61 : x
  2. Step 2: Convert to fraction form
    158,268.93/218,411.76 = 86,655.61/x
  3. Step 3: Cross multiply
    158,268.93x = 218,411.76 × 86,655.61
  4. Step 4: Simplify right side
    158,268.93x = 18,926,604,404.51
  5. Step 5: Solve for x
    x = 18,926,604,404.51/158,268.93
  6. Step 6: Final answer
    x = 119,585.09

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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.