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Finding the Fourth Proportional to 261,401.28, 392,100 and 74,412.48

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Solution

The fourth proportional to 261,401.28, 392,100 and 74,412.48 is: 111,618.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,401.28 : 392,100 = 74,412.48 : x
  2. Step 2: Convert to fraction form
    261,401.28/392,100 = 74,412.48/x
  3. Step 3: Cross multiply
    261,401.28x = 392,100 × 74,412.48
  4. Step 4: Simplify right side
    261,401.28x = 29,177,133,408
  5. Step 5: Solve for x
    x = 29,177,133,408/261,401.28
  6. Step 6: Final answer
    x = 111,618.17

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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.