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Finding the Fourth Proportional to 85,551.88, 128,349.64 and 35,615.36

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Solution

The fourth proportional to 85,551.88, 128,349.64 and 35,615.36 is: 53,432.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,551.88 : 128,349.64 = 35,615.36 : x
  2. Step 2: Convert to fraction form
    85,551.88/128,349.64 = 35,615.36/x
  3. Step 3: Cross multiply
    85,551.88x = 128,349.64 × 35,615.36
  4. Step 4: Simplify right side
    85,551.88x = 4,571,218,634.47
  5. Step 5: Solve for x
    x = 4,571,218,634.47/85,551.88
  6. Step 6: Final answer
    x = 53,432.12

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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.