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Finding the Fourth Proportional to 45,308.79, 67,985.46 and 20,366.46

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Solution

The fourth proportional to 45,308.79, 67,985.46 and 20,366.46 is: 30,559.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,308.79 : 67,985.46 = 20,366.46 : x
  2. Step 2: Convert to fraction form
    45,308.79/67,985.46 = 20,366.46/x
  3. Step 3: Cross multiply
    45,308.79x = 67,985.46 × 20,366.46
  4. Step 4: Simplify right side
    45,308.79x = 1,384,623,151.67
  5. Step 5: Solve for x
    x = 1,384,623,151.67/45,308.79
  6. Step 6: Final answer
    x = 30,559.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.