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Finding the Fourth Proportional to 208,726.91, 288,043.18 and 118,081

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Solution

The fourth proportional to 208,726.91, 288,043.18 and 118,081 is: 162,951.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,726.91 : 288,043.18 = 118,081 : x
  2. Step 2: Convert to fraction form
    208,726.91/288,043.18 = 118,081/x
  3. Step 3: Cross multiply
    208,726.91x = 288,043.18 × 118,081
  4. Step 4: Simplify right side
    208,726.91x = 34,012,426,737.58
  5. Step 5: Solve for x
    x = 34,012,426,737.58/208,726.91
  6. Step 6: Final answer
    x = 162,951.81

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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.