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Finding the Fourth Proportional to 208,280.79, 287,427.42 and 112,787.46

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Solution

The fourth proportional to 208,280.79, 287,427.42 and 112,787.46 is: 155,646.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,280.79 : 287,427.42 = 112,787.46 : x
  2. Step 2: Convert to fraction form
    208,280.79/287,427.42 = 112,787.46/x
  3. Step 3: Cross multiply
    208,280.79x = 287,427.42 × 112,787.46
  4. Step 4: Simplify right side
    208,280.79x = 32,418,208,636.15
  5. Step 5: Solve for x
    x = 32,418,208,636.15/208,280.79
  6. Step 6: Final answer
    x = 155,646.66

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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.