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Finding the Fourth Proportional to 261,795.25, 392,692.88 and 84,320.20

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Solution

The fourth proportional to 261,795.25, 392,692.88 and 84,320.20 is: 126,480.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,795.25 : 392,692.88 = 84,320.20 : x
  2. Step 2: Convert to fraction form
    261,795.25/392,692.88 = 84,320.20/x
  3. Step 3: Cross multiply
    261,795.25x = 392,692.88 × 84,320.20
  4. Step 4: Simplify right side
    261,795.25x = 33,111,942,180.18
  5. Step 5: Solve for x
    x = 33,111,942,180.18/261,795.25
  6. Step 6: Final answer
    x = 126,480.30

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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.