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Finding the Fourth Proportional to 65,524.40, 90,443.12 and 42,553.60

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Solution

The fourth proportional to 65,524.40, 90,443.12 and 42,553.60 is: 58,736.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,524.40 : 90,443.12 = 42,553.60 : x
  2. Step 2: Convert to fraction form
    65,524.40/90,443.12 = 42,553.60/x
  3. Step 3: Cross multiply
    65,524.40x = 90,443.12 × 42,553.60
  4. Step 4: Simplify right side
    65,524.40x = 3,848,680,351.23
  5. Step 5: Solve for x
    x = 3,848,680,351.23/65,524.40
  6. Step 6: Final answer
    x = 58,736.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.