Home / 86,614.72-129,844.32-71,918.08

Finding the Fourth Proportional to 86,614.72, 129,844.32 and 71,918.08

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Solution

The fourth proportional to 86,614.72, 129,844.32 and 71,918.08 is: 107,812.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,614.72 : 129,844.32 = 71,918.08 : x
  2. Step 2: Convert to fraction form
    86,614.72/129,844.32 = 71,918.08/x
  3. Step 3: Cross multiply
    86,614.72x = 129,844.32 × 71,918.08
  4. Step 4: Simplify right side
    86,614.72x = 9,338,154,193.31
  5. Step 5: Solve for x
    x = 9,338,154,193.31/86,614.72
  6. Step 6: Final answer
    x = 107,812.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.