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Finding the Fourth Proportional to 208,430.33, 287,634.11 and 112,936.95

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Solution

The fourth proportional to 208,430.33, 287,634.11 and 112,936.95 is: 155,853.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,430.33 : 287,634.11 = 112,936.95 : x
  2. Step 2: Convert to fraction form
    208,430.33/287,634.11 = 112,936.95/x
  3. Step 3: Cross multiply
    208,430.33x = 287,634.11 × 112,936.95
  4. Step 4: Simplify right side
    208,430.33x = 32,484,519,099.36
  5. Step 5: Solve for x
    x = 32,484,519,099.36/208,430.33
  6. Step 6: Final answer
    x = 155,853.13

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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.