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Finding the Fourth Proportional to 88,703.10, 133,054.65 and 85,203.90

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Solution

The fourth proportional to 88,703.10, 133,054.65 and 85,203.90 is: 127,805.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,703.10 : 133,054.65 = 85,203.90 : x
  2. Step 2: Convert to fraction form
    88,703.10/133,054.65 = 85,203.90/x
  3. Step 3: Cross multiply
    88,703.10x = 133,054.65 × 85,203.90
  4. Step 4: Simplify right side
    88,703.10x = 11,336,775,093.14
  5. Step 5: Solve for x
    x = 11,336,775,093.14/88,703.10
  6. Step 6: Final answer
    x = 127,805.85

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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.