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Finding the Fourth Proportional to 71,305.76, 98,403.11 and 39,039.83

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Solution

The fourth proportional to 71,305.76, 98,403.11 and 39,039.83 is: 53,875.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,305.76 : 98,403.11 = 39,039.83 : x
  2. Step 2: Convert to fraction form
    71,305.76/98,403.11 = 39,039.83/x
  3. Step 3: Cross multiply
    71,305.76x = 98,403.11 × 39,039.83
  4. Step 4: Simplify right side
    71,305.76x = 3,841,640,685.87
  5. Step 5: Solve for x
    x = 3,841,640,685.87/71,305.76
  6. Step 6: Final answer
    x = 53,875.60

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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.