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Finding the Fourth Proportional to 72,362.45, 99,865.48 and 43,689.17

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Solution

The fourth proportional to 72,362.45, 99,865.48 and 43,689.17 is: 60,294.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,362.45 : 99,865.48 = 43,689.17 : x
  2. Step 2: Convert to fraction form
    72,362.45/99,865.48 = 43,689.17/x
  3. Step 3: Cross multiply
    72,362.45x = 99,865.48 × 43,689.17
  4. Step 4: Simplify right side
    72,362.45x = 4,363,039,932.85
  5. Step 5: Solve for x
    x = 4,363,039,932.85/72,362.45
  6. Step 6: Final answer
    x = 60,294.25

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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.