Home / 155,016.11-213,905.70-87,040.50

Finding the Fourth Proportional to 155,016.11, 213,905.70 and 87,040.50

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Solution

The fourth proportional to 155,016.11, 213,905.70 and 87,040.50 is: 120,106.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,016.11 : 213,905.70 = 87,040.50 : x
  2. Step 2: Convert to fraction form
    155,016.11/213,905.70 = 87,040.50/x
  3. Step 3: Cross multiply
    155,016.11x = 213,905.70 × 87,040.50
  4. Step 4: Simplify right side
    155,016.11x = 18,618,459,080.85
  5. Step 5: Solve for x
    x = 18,618,459,080.85/155,016.11
  6. Step 6: Final answer
    x = 120,106.61

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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.