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Finding the Fourth Proportional to 112,673.73, 155,489.79 and 61,689.77

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Solution

The fourth proportional to 112,673.73, 155,489.79 and 61,689.77 is: 85,131.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,673.73 : 155,489.79 = 61,689.77 : x
  2. Step 2: Convert to fraction form
    112,673.73/155,489.79 = 61,689.77/x
  3. Step 3: Cross multiply
    112,673.73x = 155,489.79 × 61,689.77
  4. Step 4: Simplify right side
    112,673.73x = 9,592,128,836.34
  5. Step 5: Solve for x
    x = 9,592,128,836.34/112,673.73
  6. Step 6: Final answer
    x = 85,131.90

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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.