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Finding the Fourth Proportional to 65,606.31, 90,503.52 and 38,364.58

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Solution

The fourth proportional to 65,606.31, 90,503.52 and 38,364.58 is: 52,923.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,606.31 : 90,503.52 = 38,364.58 : x
  2. Step 2: Convert to fraction form
    65,606.31/90,503.52 = 38,364.58/x
  3. Step 3: Cross multiply
    65,606.31x = 90,503.52 × 38,364.58
  4. Step 4: Simplify right side
    65,606.31x = 3,472,129,502.58
  5. Step 5: Solve for x
    x = 3,472,129,502.58/65,606.31
  6. Step 6: Final answer
    x = 52,923.71

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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.