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Finding the Fourth Proportional to 65,673.64, 90,612.90 and 40,170.69

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Solution

The fourth proportional to 65,673.64, 90,612.90 and 40,170.69 is: 55,425.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,673.64 : 90,612.90 = 40,170.69 : x
  2. Step 2: Convert to fraction form
    65,673.64/90,612.90 = 40,170.69/x
  3. Step 3: Cross multiply
    65,673.64x = 90,612.90 × 40,170.69
  4. Step 4: Simplify right side
    65,673.64x = 3,639,982,715.90
  5. Step 5: Solve for x
    x = 3,639,982,715.90/65,673.64
  6. Step 6: Final answer
    x = 55,425.32

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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.