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Finding the Fourth Proportional to 208,143.04, 287,361.12 and 136,648.12

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Solution

The fourth proportional to 208,143.04, 287,361.12 and 136,648.12 is: 188,655.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,143.04 : 287,361.12 = 136,648.12 : x
  2. Step 2: Convert to fraction form
    208,143.04/287,361.12 = 136,648.12/x
  3. Step 3: Cross multiply
    208,143.04x = 287,361.12 × 136,648.12
  4. Step 4: Simplify right side
    208,143.04x = 39,267,356,809.09
  5. Step 5: Solve for x
    x = 39,267,356,809.09/208,143.04
  6. Step 6: Final answer
    x = 188,655.63

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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.