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Finding the Fourth Proportional to 73,280.88, 109,921.04 and 31,154.40

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Solution

The fourth proportional to 73,280.88, 109,921.04 and 31,154.40 is: 46,731.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,280.88 : 109,921.04 = 31,154.40 : x
  2. Step 2: Convert to fraction form
    73,280.88/109,921.04 = 31,154.40/x
  3. Step 3: Cross multiply
    73,280.88x = 109,921.04 × 31,154.40
  4. Step 4: Simplify right side
    73,280.88x = 3,424,523,892.80
  5. Step 5: Solve for x
    x = 3,424,523,892.80/73,280.88
  6. Step 6: Final answer
    x = 46,731.48

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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.