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Finding the Fourth Proportional to 81,603.79, 112,621.32 and 45,793.95

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Solution

The fourth proportional to 81,603.79, 112,621.32 and 45,793.95 is: 63,200.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,603.79 : 112,621.32 = 45,793.95 : x
  2. Step 2: Convert to fraction form
    81,603.79/112,621.32 = 45,793.95/x
  3. Step 3: Cross multiply
    81,603.79x = 112,621.32 × 45,793.95
  4. Step 4: Simplify right side
    81,603.79x = 5,157,375,097.01
  5. Step 5: Solve for x
    x = 5,157,375,097.01/81,603.79
  6. Step 6: Final answer
    x = 63,200.19

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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.