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Finding the Fourth Proportional to 65,572.81, 90,487.80 and 38,723.95

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Solution

The fourth proportional to 65,572.81, 90,487.80 and 38,723.95 is: 53,437.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,572.81 : 90,487.80 = 38,723.95 : x
  2. Step 2: Convert to fraction form
    65,572.81/90,487.80 = 38,723.95/x
  3. Step 3: Cross multiply
    65,572.81x = 90,487.80 × 38,723.95
  4. Step 4: Simplify right side
    65,572.81x = 3,504,045,042.81
  5. Step 5: Solve for x
    x = 3,504,045,042.81/65,572.81
  6. Step 6: Final answer
    x = 53,437.47

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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.