Home / 86,170.37-129,278.34-39,412.31

Finding the Fourth Proportional to 86,170.37, 129,278.34 and 39,412.31

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Solution

The fourth proportional to 86,170.37, 129,278.34 and 39,412.31 is: 59,128.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,170.37 : 129,278.34 = 39,412.31 : x
  2. Step 2: Convert to fraction form
    86,170.37/129,278.34 = 39,412.31/x
  3. Step 3: Cross multiply
    86,170.37x = 129,278.34 × 39,412.31
  4. Step 4: Simplify right side
    86,170.37x = 5,095,158,335.56
  5. Step 5: Solve for x
    x = 5,095,158,335.56/86,170.37
  6. Step 6: Final answer
    x = 59,128.89

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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.