Home / 88,921.70-133,382.55-85,811.30

Finding the Fourth Proportional to 88,921.70, 133,382.55 and 85,811.30

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Solution

The fourth proportional to 88,921.70, 133,382.55 and 85,811.30 is: 128,716.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,921.70 : 133,382.55 = 85,811.30 : x
  2. Step 2: Convert to fraction form
    88,921.70/133,382.55 = 85,811.30/x
  3. Step 3: Cross multiply
    88,921.70x = 133,382.55 × 85,811.30
  4. Step 4: Simplify right side
    88,921.70x = 11,445,730,012.82
  5. Step 5: Solve for x
    x = 11,445,730,012.82/88,921.70
  6. Step 6: Final answer
    x = 128,716.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.