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Finding the Fourth Proportional to 72,490.82, 100,113.37 and 49,888.17

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Solution

The fourth proportional to 72,490.82, 100,113.37 and 49,888.17 is: 68,898.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,490.82 : 100,113.37 = 49,888.17 : x
  2. Step 2: Convert to fraction form
    72,490.82/100,113.37 = 49,888.17/x
  3. Step 3: Cross multiply
    72,490.82x = 100,113.37 × 49,888.17
  4. Step 4: Simplify right side
    72,490.82x = 4,994,472,697.11
  5. Step 5: Solve for x
    x = 4,994,472,697.11/72,490.82
  6. Step 6: Final answer
    x = 68,898.01

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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.