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Finding the Fourth Proportional to 261,708.57, 392,051.64 and 124,736.76

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Solution

The fourth proportional to 261,708.57, 392,051.64 and 124,736.76 is: 186,861.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,708.57 : 392,051.64 = 124,736.76 : x
  2. Step 2: Convert to fraction form
    261,708.57/392,051.64 = 124,736.76/x
  3. Step 3: Cross multiply
    261,708.57x = 392,051.64 × 124,736.76
  4. Step 4: Simplify right side
    261,708.57x = 48,903,251,794.05
  5. Step 5: Solve for x
    x = 48,903,251,794.05/261,708.57
  6. Step 6: Final answer
    x = 186,861.48

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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.