Home / 148,921.85-205,516.05-85,280.15

Finding the Fourth Proportional to 148,921.85, 205,516.05 and 85,280.15

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Solution

The fourth proportional to 148,921.85, 205,516.05 and 85,280.15 is: 117,688.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,921.85 : 205,516.05 = 85,280.15 : x
  2. Step 2: Convert to fraction form
    148,921.85/205,516.05 = 85,280.15/x
  3. Step 3: Cross multiply
    148,921.85x = 205,516.05 × 85,280.15
  4. Step 4: Simplify right side
    148,921.85x = 17,526,439,571.41
  5. Step 5: Solve for x
    x = 17,526,439,571.41/148,921.85
  6. Step 6: Final answer
    x = 117,688.84

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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.