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Finding the Fourth Proportional to 90,668.94, 136,028.94 and 31,510.59

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Solution

The fourth proportional to 90,668.94, 136,028.94 and 31,510.59 is: 47,274.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,668.94 : 136,028.94 = 31,510.59 : x
  2. Step 2: Convert to fraction form
    90,668.94/136,028.94 = 31,510.59/x
  3. Step 3: Cross multiply
    90,668.94x = 136,028.94 × 31,510.59
  4. Step 4: Simplify right side
    90,668.94x = 4,286,352,156.47
  5. Step 5: Solve for x
    x = 4,286,352,156.47/90,668.94
  6. Step 6: Final answer
    x = 47,274.76

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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.