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Finding the Fourth Proportional to 65,597.40, 90,432 and 55,484.96

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Solution

The fourth proportional to 65,597.40, 90,432 and 55,484.96 is: 76,491.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,597.40 : 90,432 = 55,484.96 : x
  2. Step 2: Convert to fraction form
    65,597.40/90,432 = 55,484.96/x
  3. Step 3: Cross multiply
    65,597.40x = 90,432 × 55,484.96
  4. Step 4: Simplify right side
    65,597.40x = 5,017,615,450.56
  5. Step 5: Solve for x
    x = 5,017,615,450.56/65,597.40
  6. Step 6: Final answer
    x = 76,491.07

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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.