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Finding the Fourth Proportional to 135,848.30, 203,772.45 and 85,328.60

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Solution

The fourth proportional to 135,848.30, 203,772.45 and 85,328.60 is: 127,992.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,848.30 : 203,772.45 = 85,328.60 : x
  2. Step 2: Convert to fraction form
    135,848.30/203,772.45 = 85,328.60/x
  3. Step 3: Cross multiply
    135,848.30x = 203,772.45 × 85,328.60
  4. Step 4: Simplify right side
    135,848.30x = 17,387,617,877.07
  5. Step 5: Solve for x
    x = 17,387,617,877.07/135,848.30
  6. Step 6: Final answer
    x = 127,992.90

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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.