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Finding the Fourth Proportional to 129,145.46, 193,628.88 and 65,842.74

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Solution

The fourth proportional to 129,145.46, 193,628.88 and 65,842.74 is: 98,718.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,145.46 : 193,628.88 = 65,842.74 : x
  2. Step 2: Convert to fraction form
    129,145.46/193,628.88 = 65,842.74/x
  3. Step 3: Cross multiply
    129,145.46x = 193,628.88 × 65,842.74
  4. Step 4: Simplify right side
    129,145.46x = 12,749,056,002.33
  5. Step 5: Solve for x
    x = 12,749,056,002.33/129,145.46
  6. Step 6: Final answer
    x = 98,718.58

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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.