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Finding the Fourth Proportional to 71,518.83, 98,696.37 and 39,687.74

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Solution

The fourth proportional to 71,518.83, 98,696.37 and 39,687.74 is: 54,769.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,518.83 : 98,696.37 = 39,687.74 : x
  2. Step 2: Convert to fraction form
    71,518.83/98,696.37 = 39,687.74/x
  3. Step 3: Cross multiply
    71,518.83x = 98,696.37 × 39,687.74
  4. Step 4: Simplify right side
    71,518.83x = 3,917,035,378.02
  5. Step 5: Solve for x
    x = 3,917,035,378.02/71,518.83
  6. Step 6: Final answer
    x = 54,769.29

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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.