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Finding the Fourth Proportional to 128,892.53, 193,336.65 and 52,975.68

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Solution

The fourth proportional to 128,892.53, 193,336.65 and 52,975.68 is: 79,462.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,892.53 : 193,336.65 = 52,975.68 : x
  2. Step 2: Convert to fraction form
    128,892.53/193,336.65 = 52,975.68/x
  3. Step 3: Cross multiply
    128,892.53x = 193,336.65 × 52,975.68
  4. Step 4: Simplify right side
    128,892.53x = 10,242,140,502.67
  5. Step 5: Solve for x
    x = 10,242,140,502.67/128,892.53
  6. Step 6: Final answer
    x = 79,462.64

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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.