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Finding the Fourth Proportional to 93,169.80, 128,329.38 and 71,618.28

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Solution

The fourth proportional to 93,169.80, 128,329.38 and 71,618.28 is: 98,644.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,169.80 : 128,329.38 = 71,618.28 : x
  2. Step 2: Convert to fraction form
    93,169.80/128,329.38 = 71,618.28/x
  3. Step 3: Cross multiply
    93,169.80x = 128,329.38 × 71,618.28
  4. Step 4: Simplify right side
    93,169.80x = 9,190,729,469.07
  5. Step 5: Solve for x
    x = 9,190,729,469.07/93,169.80
  6. Step 6: Final answer
    x = 98,644.94

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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.