Home / 115,287.12-159,094.80-64,986.12

Finding the Fourth Proportional to 115,287.12, 159,094.80 and 64,986.12

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Solution

The fourth proportional to 115,287.12, 159,094.80 and 64,986.12 is: 89,680.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,287.12 : 159,094.80 = 64,986.12 : x
  2. Step 2: Convert to fraction form
    115,287.12/159,094.80 = 64,986.12/x
  3. Step 3: Cross multiply
    115,287.12x = 159,094.80 × 64,986.12
  4. Step 4: Simplify right side
    115,287.12x = 10,338,953,764.18
  5. Step 5: Solve for x
    x = 10,338,953,764.18/115,287.12
  6. Step 6: Final answer
    x = 89,680.04

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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.