Home / 261,629.64-392,296.80-90,771.21

Finding the Fourth Proportional to 261,629.64, 392,296.80 and 90,771.21

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Solution

The fourth proportional to 261,629.64, 392,296.80 and 90,771.21 is: 136,105.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,629.64 : 392,296.80 = 90,771.21 : x
  2. Step 2: Convert to fraction form
    261,629.64/392,296.80 = 90,771.21/x
  3. Step 3: Cross multiply
    261,629.64x = 392,296.80 × 90,771.21
  4. Step 4: Simplify right side
    261,629.64x = 35,609,255,215.13
  5. Step 5: Solve for x
    x = 35,609,255,215.13/261,629.64
  6. Step 6: Final answer
    x = 136,105.59

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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.