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Finding the Fourth Proportional to 71,640.40, 98,835.40 and 41,420.16

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Solution

The fourth proportional to 71,640.40, 98,835.40 and 41,420.16 is: 57,143.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,640.40 : 98,835.40 = 41,420.16 : x
  2. Step 2: Convert to fraction form
    71,640.40/98,835.40 = 41,420.16/x
  3. Step 3: Cross multiply
    71,640.40x = 98,835.40 × 41,420.16
  4. Step 4: Simplify right side
    71,640.40x = 4,093,778,081.66
  5. Step 5: Solve for x
    x = 4,093,778,081.66/71,640.40
  6. Step 6: Final answer
    x = 57,143.43

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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.