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Finding the Fourth Proportional to 268,962.40, 403,443.60 and 81,983.20

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Solution

The fourth proportional to 268,962.40, 403,443.60 and 81,983.20 is: 122,974.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,962.40 : 403,443.60 = 81,983.20 : x
  2. Step 2: Convert to fraction form
    268,962.40/403,443.60 = 81,983.20/x
  3. Step 3: Cross multiply
    268,962.40x = 403,443.60 × 81,983.20
  4. Step 4: Simplify right side
    268,962.40x = 33,075,597,347.52
  5. Step 5: Solve for x
    x = 33,075,597,347.52/268,962.40
  6. Step 6: Final answer
    x = 122,974.80

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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.