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Finding the Fourth Proportional to 103,403.52, 155,151.36 and 54,144

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Solution

The fourth proportional to 103,403.52, 155,151.36 and 54,144 is: 81,240.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,403.52 : 155,151.36 = 54,144 : x
  2. Step 2: Convert to fraction form
    103,403.52/155,151.36 = 54,144/x
  3. Step 3: Cross multiply
    103,403.52x = 155,151.36 × 54,144
  4. Step 4: Simplify right side
    103,403.52x = 8,400,515,235.84
  5. Step 5: Solve for x
    x = 8,400,515,235.84/103,403.52
  6. Step 6: Final answer
    x = 81,240.13

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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.