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Finding the Fourth Proportional to 65,620.05, 90,555.64 and 35,812.05

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Solution

The fourth proportional to 65,620.05, 90,555.64 and 35,812.05 is: 49,420.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,620.05 : 90,555.64 = 35,812.05 : x
  2. Step 2: Convert to fraction form
    65,620.05/90,555.64 = 35,812.05/x
  3. Step 3: Cross multiply
    65,620.05x = 90,555.64 × 35,812.05
  4. Step 4: Simplify right side
    65,620.05x = 3,242,983,107.46
  5. Step 5: Solve for x
    x = 3,242,983,107.46/65,620.05
  6. Step 6: Final answer
    x = 49,420.61

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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.