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Finding the Fourth Proportional to 261,780.72, 392,119.40 and 119,745.60

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Solution

The fourth proportional to 261,780.72, 392,119.40 and 119,745.60 is: 179,366.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,780.72 : 392,119.40 = 119,745.60 : x
  2. Step 2: Convert to fraction form
    261,780.72/392,119.40 = 119,745.60/x
  3. Step 3: Cross multiply
    261,780.72x = 392,119.40 × 119,745.60
  4. Step 4: Simplify right side
    261,780.72x = 46,954,572,824.64
  5. Step 5: Solve for x
    x = 46,954,572,824.64/261,780.72
  6. Step 6: Final answer
    x = 179,366.05

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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.