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Finding the Fourth Proportional to 128,941.96, 193,709.46 and 91,592.92

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Solution

The fourth proportional to 128,941.96, 193,709.46 and 91,592.92 is: 137,600.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,941.96 : 193,709.46 = 91,592.92 : x
  2. Step 2: Convert to fraction form
    128,941.96/193,709.46 = 91,592.92/x
  3. Step 3: Cross multiply
    128,941.96x = 193,709.46 × 91,592.92
  4. Step 4: Simplify right side
    128,941.96x = 17,742,415,073.02
  5. Step 5: Solve for x
    x = 17,742,415,073.02/128,941.96
  6. Step 6: Final answer
    x = 137,600.01

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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.