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Finding the Fourth Proportional to 71,664.84, 98,898.66 and 39,400.82

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Solution

The fourth proportional to 71,664.84, 98,898.66 and 39,400.82 is: 54,373.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,664.84 : 98,898.66 = 39,400.82 : x
  2. Step 2: Convert to fraction form
    71,664.84/98,898.66 = 39,400.82/x
  3. Step 3: Cross multiply
    71,664.84x = 98,898.66 × 39,400.82
  4. Step 4: Simplify right side
    71,664.84x = 3,896,688,300.90
  5. Step 5: Solve for x
    x = 3,896,688,300.90/71,664.84
  6. Step 6: Final answer
    x = 54,373.78

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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.