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Finding the Fourth Proportional to 129,347.68, 193,740.32 and 79,276.64

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Solution

The fourth proportional to 129,347.68, 193,740.32 and 79,276.64 is: 118,742.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,347.68 : 193,740.32 = 79,276.64 : x
  2. Step 2: Convert to fraction form
    129,347.68/193,740.32 = 79,276.64/x
  3. Step 3: Cross multiply
    129,347.68x = 193,740.32 × 79,276.64
  4. Step 4: Simplify right side
    129,347.68x = 15,359,081,602.12
  5. Step 5: Solve for x
    x = 15,359,081,602.12/129,347.68
  6. Step 6: Final answer
    x = 118,742.61

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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.