Home / 155,904.45-215,154.41-86,999.94

Finding the Fourth Proportional to 155,904.45, 215,154.41 and 86,999.94

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Solution

The fourth proportional to 155,904.45, 215,154.41 and 86,999.94 is: 120,063.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,904.45 : 215,154.41 = 86,999.94 : x
  2. Step 2: Convert to fraction form
    155,904.45/215,154.41 = 86,999.94/x
  3. Step 3: Cross multiply
    155,904.45x = 215,154.41 × 86,999.94
  4. Step 4: Simplify right side
    155,904.45x = 18,718,420,325.74
  5. Step 5: Solve for x
    x = 18,718,420,325.74/155,904.45
  6. Step 6: Final answer
    x = 120,063.41

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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.