Home / 155,956.36-215,232.54-87,969.88

Finding the Fourth Proportional to 155,956.36, 215,232.54 and 87,969.88

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Solution

The fourth proportional to 155,956.36, 215,232.54 and 87,969.88 is: 121,405.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,956.36 : 215,232.54 = 87,969.88 : x
  2. Step 2: Convert to fraction form
    155,956.36/215,232.54 = 87,969.88/x
  3. Step 3: Cross multiply
    155,956.36x = 215,232.54 × 87,969.88
  4. Step 4: Simplify right side
    155,956.36x = 18,933,980,715.90
  5. Step 5: Solve for x
    x = 18,933,980,715.90/155,956.36
  6. Step 6: Final answer
    x = 121,405.63

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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.