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Finding the Fourth Proportional to 208,318.62, 287,485.02 and 127,790.58

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Solution

The fourth proportional to 208,318.62, 287,485.02 and 127,790.58 is: 176,354.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,318.62 : 287,485.02 = 127,790.58 : x
  2. Step 2: Convert to fraction form
    208,318.62/287,485.02 = 127,790.58/x
  3. Step 3: Cross multiply
    208,318.62x = 287,485.02 × 127,790.58
  4. Step 4: Simplify right side
    208,318.62x = 36,737,877,447.11
  5. Step 5: Solve for x
    x = 36,737,877,447.11/208,318.62
  6. Step 6: Final answer
    x = 176,354.27

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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.