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Finding the Fourth Proportional to 65,671.56, 90,633.42 and 38,822.76

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Solution

The fourth proportional to 65,671.56, 90,633.42 and 38,822.76 is: 53,579.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,671.56 : 90,633.42 = 38,822.76 : x
  2. Step 2: Convert to fraction form
    65,671.56/90,633.42 = 38,822.76/x
  3. Step 3: Cross multiply
    65,671.56x = 90,633.42 × 38,822.76
  4. Step 4: Simplify right side
    65,671.56x = 3,518,639,512.64
  5. Step 5: Solve for x
    x = 3,518,639,512.64/65,671.56
  6. Step 6: Final answer
    x = 53,579.35

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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.