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Finding the Fourth Proportional to 208,695.17, 312,981.19 and 88,751.89

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Solution

The fourth proportional to 208,695.17, 312,981.19 and 88,751.89 is: 133,101.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,695.17 : 312,981.19 = 88,751.89 : x
  2. Step 2: Convert to fraction form
    208,695.17/312,981.19 = 88,751.89/x
  3. Step 3: Cross multiply
    208,695.17x = 312,981.19 × 88,751.89
  4. Step 4: Simplify right side
    208,695.17x = 27,777,671,142.62
  5. Step 5: Solve for x
    x = 27,777,671,142.62/208,695.17
  6. Step 6: Final answer
    x = 133,101.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.