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Finding the Fourth Proportional to 208,445.06, 287,655.17 and 112,951.95

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Solution

The fourth proportional to 208,445.06, 287,655.17 and 112,951.95 is: 155,874.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,445.06 : 287,655.17 = 112,951.95 : x
  2. Step 2: Convert to fraction form
    208,445.06/287,655.17 = 112,951.95/x
  3. Step 3: Cross multiply
    208,445.06x = 287,655.17 × 112,951.95
  4. Step 4: Simplify right side
    208,445.06x = 32,491,211,814.32
  5. Step 5: Solve for x
    x = 32,491,211,814.32/208,445.06
  6. Step 6: Final answer
    x = 155,874.23

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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.