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Finding the Fourth Proportional to 208,121.60, 287,208.71 and 112,628.31

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Solution

The fourth proportional to 208,121.60, 287,208.71 and 112,628.31 is: 155,427.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,121.60 : 287,208.71 = 112,628.31 : x
  2. Step 2: Convert to fraction form
    208,121.60/287,208.71 = 112,628.31/x
  3. Step 3: Cross multiply
    208,121.60x = 287,208.71 × 112,628.31
  4. Step 4: Simplify right side
    208,121.60x = 32,347,831,061.44
  5. Step 5: Solve for x
    x = 32,347,831,061.44/208,121.60
  6. Step 6: Final answer
    x = 155,427.56

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1.5x scale

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.