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Finding the Fourth Proportional to 292,100.16, 438,223.12 and 81,736.26

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Solution

The fourth proportional to 292,100.16, 438,223.12 and 81,736.26 is: 122,624.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,100.16 : 438,223.12 = 81,736.26 : x
  2. Step 2: Convert to fraction form
    292,100.16/438,223.12 = 81,736.26/x
  3. Step 3: Cross multiply
    292,100.16x = 438,223.12 × 81,736.26
  4. Step 4: Simplify right side
    292,100.16x = 35,818,718,874.33
  5. Step 5: Solve for x
    x = 35,818,718,874.33/292,100.16
  6. Step 6: Final answer
    x = 122,624.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.