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Finding the Fourth Proportional to 100,383.72, 138,526.98 and 57,949.32

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Solution

The fourth proportional to 100,383.72, 138,526.98 and 57,949.32 is: 79,968.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,383.72 : 138,526.98 = 57,949.32 : x
  2. Step 2: Convert to fraction form
    100,383.72/138,526.98 = 57,949.32/x
  3. Step 3: Cross multiply
    100,383.72x = 138,526.98 × 57,949.32
  4. Step 4: Simplify right side
    100,383.72x = 8,027,544,292.65
  5. Step 5: Solve for x
    x = 8,027,544,292.65/100,383.72
  6. Step 6: Final answer
    x = 79,968.59

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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.