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Finding the Fourth Proportional to 71,812.95, 99,113.73 and 54,785.04

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Solution

The fourth proportional to 71,812.95, 99,113.73 and 54,785.04 is: 75,612.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,812.95 : 99,113.73 = 54,785.04 : x
  2. Step 2: Convert to fraction form
    71,812.95/99,113.73 = 54,785.04/x
  3. Step 3: Cross multiply
    71,812.95x = 99,113.73 × 54,785.04
  4. Step 4: Simplify right side
    71,812.95x = 5,429,949,662.60
  5. Step 5: Solve for x
    x = 5,429,949,662.60/71,812.95
  6. Step 6: Final answer
    x = 75,612.40

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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.