Home / 151,438.29-208,979.94-86,918.15

Finding the Fourth Proportional to 151,438.29, 208,979.94 and 86,918.15

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Solution

The fourth proportional to 151,438.29, 208,979.94 and 86,918.15 is: 119,944.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,438.29 : 208,979.94 = 86,918.15 : x
  2. Step 2: Convert to fraction form
    151,438.29/208,979.94 = 86,918.15/x
  3. Step 3: Cross multiply
    151,438.29x = 208,979.94 × 86,918.15
  4. Step 4: Simplify right side
    151,438.29x = 18,164,148,727.01
  5. Step 5: Solve for x
    x = 18,164,148,727.01/151,438.29
  6. Step 6: Final answer
    x = 119,944.23

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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.