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Finding the Fourth Proportional to 72,968.25, 100,696.19 and 39,434.25

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Solution

The fourth proportional to 72,968.25, 100,696.19 and 39,434.25 is: 54,419.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,968.25 : 100,696.19 = 39,434.25 : x
  2. Step 2: Convert to fraction form
    72,968.25/100,696.19 = 39,434.25/x
  3. Step 3: Cross multiply
    72,968.25x = 100,696.19 × 39,434.25
  4. Step 4: Simplify right side
    72,968.25x = 3,970,878,533.34
  5. Step 5: Solve for x
    x = 3,970,878,533.34/72,968.25
  6. Step 6: Final answer
    x = 54,419.27

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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.