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Finding the Fourth Proportional to 128,677, 193,119.18 and 66,365.32

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Solution

The fourth proportional to 128,677, 193,119.18 and 66,365.32 is: 99,601.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,677 : 193,119.18 = 66,365.32 : x
  2. Step 2: Convert to fraction form
    128,677/193,119.18 = 66,365.32/x
  3. Step 3: Cross multiply
    128,677x = 193,119.18 × 66,365.32
  4. Step 4: Simplify right side
    128,677x = 12,816,416,178.84
  5. Step 5: Solve for x
    x = 12,816,416,178.84/128,677
  6. Step 6: Final answer
    x = 99,601.45

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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.