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Finding the Fourth Proportional to 71,549.92, 98,739.54 and 39,721.84

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Solution

The fourth proportional to 71,549.92, 98,739.54 and 39,721.84 is: 54,816.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,549.92 : 98,739.54 = 39,721.84 : x
  2. Step 2: Convert to fraction form
    71,549.92/98,739.54 = 39,721.84/x
  3. Step 3: Cross multiply
    71,549.92x = 98,739.54 × 39,721.84
  4. Step 4: Simplify right side
    71,549.92x = 3,922,116,209.55
  5. Step 5: Solve for x
    x = 3,922,116,209.55/71,549.92
  6. Step 6: Final answer
    x = 54,816.50

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1.5x scale

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.