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Finding the Fourth Proportional to 128,045.55, 192,068.33 and 54,163.95

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Solution

The fourth proportional to 128,045.55, 192,068.33 and 54,163.95 is: 81,245.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,045.55 : 192,068.33 = 54,163.95 : x
  2. Step 2: Convert to fraction form
    128,045.55/192,068.33 = 54,163.95/x
  3. Step 3: Cross multiply
    128,045.55x = 192,068.33 × 54,163.95
  4. Step 4: Simplify right side
    128,045.55x = 10,403,179,151.88
  5. Step 5: Solve for x
    x = 10,403,179,151.88/128,045.55
  6. Step 6: Final answer
    x = 81,245.93

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1.5x scale

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.