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Finding the Fourth Proportional to 65,672.61, 90,628.12 and 38,824.80

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Solution

The fourth proportional to 65,672.61, 90,628.12 and 38,824.80 is: 53,578.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,672.61 : 90,628.12 = 38,824.80 : x
  2. Step 2: Convert to fraction form
    65,672.61/90,628.12 = 38,824.80/x
  3. Step 3: Cross multiply
    65,672.61x = 90,628.12 × 38,824.80
  4. Step 4: Simplify right side
    65,672.61x = 3,518,618,633.38
  5. Step 5: Solve for x
    x = 3,518,618,633.38/65,672.61
  6. Step 6: Final answer
    x = 53,578.18

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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.