Home / 86,979.84-120,055.80-51,181.36

Finding the Fourth Proportional to 86,979.84, 120,055.80 and 51,181.36

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Solution

The fourth proportional to 86,979.84, 120,055.80 and 51,181.36 is: 70,644.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,979.84 : 120,055.80 = 51,181.36 : x
  2. Step 2: Convert to fraction form
    86,979.84/120,055.80 = 51,181.36/x
  3. Step 3: Cross multiply
    86,979.84x = 120,055.80 × 51,181.36
  4. Step 4: Simplify right side
    86,979.84x = 6,144,619,119.89
  5. Step 5: Solve for x
    x = 6,144,619,119.89/86,979.84
  6. Step 6: Final answer
    x = 70,644.18

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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.