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Finding the Fourth Proportional to 261,504.70, 392,257.05 and 71,964.70

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Solution

The fourth proportional to 261,504.70, 392,257.05 and 71,964.70 is: 107,947.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,504.70 : 392,257.05 = 71,964.70 : x
  2. Step 2: Convert to fraction form
    261,504.70/392,257.05 = 71,964.70/x
  3. Step 3: Cross multiply
    261,504.70x = 392,257.05 × 71,964.70
  4. Step 4: Simplify right side
    261,504.70x = 28,228,660,926.14
  5. Step 5: Solve for x
    x = 28,228,660,926.14/261,504.70
  6. Step 6: Final answer
    x = 107,947.05

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1.5x scale

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.