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Finding the Fourth Proportional to 261,574.88, 392,365.92 and 74,586.36

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Solution

The fourth proportional to 261,574.88, 392,365.92 and 74,586.36 is: 111,880.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,574.88 : 392,365.92 = 74,586.36 : x
  2. Step 2: Convert to fraction form
    261,574.88/392,365.92 = 74,586.36/x
  3. Step 3: Cross multiply
    261,574.88x = 392,365.92 × 74,586.36
  4. Step 4: Simplify right side
    261,574.88x = 29,265,145,760.85
  5. Step 5: Solve for x
    x = 29,265,145,760.85/261,574.88
  6. Step 6: Final answer
    x = 111,880.57

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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.