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Finding the Fourth Proportional to 251,640, 347,265.63 and 138,465.18

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Solution

The fourth proportional to 251,640, 347,265.63 and 138,465.18 is: 191,083.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,640 : 347,265.63 = 138,465.18 : x
  2. Step 2: Convert to fraction form
    251,640/347,265.63 = 138,465.18/x
  3. Step 3: Cross multiply
    251,640x = 347,265.63 × 138,465.18
  4. Step 4: Simplify right side
    251,640x = 48,084,197,965.76
  5. Step 5: Solve for x
    x = 48,084,197,965.76/251,640
  6. Step 6: Final answer
    x = 191,083.29

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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.