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Finding the Fourth Proportional to 208,122.85, 287,208.47 and 112,629.56

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Solution

The fourth proportional to 208,122.85, 287,208.47 and 112,629.56 is: 155,428.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,122.85 : 287,208.47 = 112,629.56 : x
  2. Step 2: Convert to fraction form
    208,122.85/287,208.47 = 112,629.56/x
  3. Step 3: Cross multiply
    208,122.85x = 287,208.47 × 112,629.56
  4. Step 4: Simplify right side
    208,122.85x = 32,348,163,041.23
  5. Step 5: Solve for x
    x = 32,348,163,041.23/208,122.85
  6. Step 6: Final answer
    x = 155,428.22

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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.