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Finding the Fourth Proportional to 90,696.70, 136,046.42 and 34,539.92

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Solution

The fourth proportional to 90,696.70, 136,046.42 and 34,539.92 is: 51,810.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,696.70 : 136,046.42 = 34,539.92 : x
  2. Step 2: Convert to fraction form
    90,696.70/136,046.42 = 34,539.92/x
  3. Step 3: Cross multiply
    90,696.70x = 136,046.42 × 34,539.92
  4. Step 4: Simplify right side
    90,696.70x = 4,699,031,869.20
  5. Step 5: Solve for x
    x = 4,699,031,869.20/90,696.70
  6. Step 6: Final answer
    x = 51,810.40

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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.