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Finding the Fourth Proportional to 68,676.95, 102,983.70 and 31,235.51

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Solution

The fourth proportional to 68,676.95, 102,983.70 and 31,235.51 is: 46,838.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,676.95 : 102,983.70 = 31,235.51 : x
  2. Step 2: Convert to fraction form
    68,676.95/102,983.70 = 31,235.51/x
  3. Step 3: Cross multiply
    68,676.95x = 102,983.70 × 31,235.51
  4. Step 4: Simplify right side
    68,676.95x = 3,216,748,391.19
  5. Step 5: Solve for x
    x = 3,216,748,391.19/68,676.95
  6. Step 6: Final answer
    x = 46,838.84

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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.