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Finding the Fourth Proportional to 45,278.48, 67,742.04 and 39,689.84

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Solution

The fourth proportional to 45,278.48, 67,742.04 and 39,689.84 is: 59,380.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,278.48 : 67,742.04 = 39,689.84 : x
  2. Step 2: Convert to fraction form
    45,278.48/67,742.04 = 39,689.84/x
  3. Step 3: Cross multiply
    45,278.48x = 67,742.04 × 39,689.84
  4. Step 4: Simplify right side
    45,278.48x = 2,688,670,728.87
  5. Step 5: Solve for x
    x = 2,688,670,728.87/45,278.48
  6. Step 6: Final answer
    x = 59,380.76

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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.