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Finding the Fourth Proportional to 105,694.67, 145,773.95 and 92,920.70

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Solution

The fourth proportional to 105,694.67, 145,773.95 and 92,920.70 is: 128,156.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,694.67 : 145,773.95 = 92,920.70 : x
  2. Step 2: Convert to fraction form
    105,694.67/145,773.95 = 92,920.70/x
  3. Step 3: Cross multiply
    105,694.67x = 145,773.95 × 92,920.70
  4. Step 4: Simplify right side
    105,694.67x = 13,545,417,375.60
  5. Step 5: Solve for x
    x = 13,545,417,375.60/105,694.67
  6. Step 6: Final answer
    x = 128,156.10

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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.