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Finding the Fourth Proportional to 65,730.46, 90,675.39 and 38,859.88

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Solution

The fourth proportional to 65,730.46, 90,675.39 and 38,859.88 is: 53,607.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,730.46 : 90,675.39 = 38,859.88 : x
  2. Step 2: Convert to fraction form
    65,730.46/90,675.39 = 38,859.88/x
  3. Step 3: Cross multiply
    65,730.46x = 90,675.39 × 38,859.88
  4. Step 4: Simplify right side
    65,730.46x = 3,523,634,774.35
  5. Step 5: Solve for x
    x = 3,523,634,774.35/65,730.46
  6. Step 6: Final answer
    x = 53,607.33

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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.