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Finding the Fourth Proportional to 66,408.80, 99,728.40 and 35,304.80

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Solution

The fourth proportional to 66,408.80, 99,728.40 and 35,304.80 is: 53,018.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,408.80 : 99,728.40 = 35,304.80 : x
  2. Step 2: Convert to fraction form
    66,408.80/99,728.40 = 35,304.80/x
  3. Step 3: Cross multiply
    66,408.80x = 99,728.40 × 35,304.80
  4. Step 4: Simplify right side
    66,408.80x = 3,520,891,216.32
  5. Step 5: Solve for x
    x = 3,520,891,216.32/66,408.80
  6. Step 6: Final answer
    x = 53,018.44

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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.