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Finding the Fourth Proportional to 154,379.95, 213,039.76 and 85,472.49

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Solution

The fourth proportional to 154,379.95, 213,039.76 and 85,472.49 is: 117,949.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,379.95 : 213,039.76 = 85,472.49 : x
  2. Step 2: Convert to fraction form
    154,379.95/213,039.76 = 85,472.49/x
  3. Step 3: Cross multiply
    154,379.95x = 213,039.76 × 85,472.49
  4. Step 4: Simplify right side
    154,379.95x = 18,209,038,756.20
  5. Step 5: Solve for x
    x = 18,209,038,756.20/154,379.95
  6. Step 6: Final answer
    x = 117,949.51

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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.