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Finding the Fourth Proportional to 128,766.08, 193,204.60 and 69,643.38

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Solution

The fourth proportional to 128,766.08, 193,204.60 and 69,643.38 is: 104,495.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,766.08 : 193,204.60 = 69,643.38 : x
  2. Step 2: Convert to fraction form
    128,766.08/193,204.60 = 69,643.38/x
  3. Step 3: Cross multiply
    128,766.08x = 193,204.60 × 69,643.38
  4. Step 4: Simplify right side
    128,766.08x = 13,455,421,375.55
  5. Step 5: Solve for x
    x = 13,455,421,375.55/128,766.08
  6. Step 6: Final answer
    x = 104,495.08

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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.