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Finding the Fourth Proportional to 539,083.70, 808,625.55 and 139,721.30

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Solution

The fourth proportional to 539,083.70, 808,625.55 and 139,721.30 is: 209,581.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,083.70 : 808,625.55 = 139,721.30 : x
  2. Step 2: Convert to fraction form
    539,083.70/808,625.55 = 139,721.30/x
  3. Step 3: Cross multiply
    539,083.70x = 808,625.55 × 139,721.30
  4. Step 4: Simplify right side
    539,083.70x = 112,982,213,059.22
  5. Step 5: Solve for x
    x = 112,982,213,059.22/539,083.70
  6. Step 6: Final answer
    x = 209,581.95

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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.