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Finding the Fourth Proportional to 112,179.76, 154,805.61 and 61,878.76

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Solution

The fourth proportional to 112,179.76, 154,805.61 and 61,878.76 is: 85,391.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,179.76 : 154,805.61 = 61,878.76 : x
  2. Step 2: Convert to fraction form
    112,179.76/154,805.61 = 61,878.76/x
  3. Step 3: Cross multiply
    112,179.76x = 154,805.61 × 61,878.76
  4. Step 4: Simplify right side
    112,179.76x = 9,579,179,187.84
  5. Step 5: Solve for x
    x = 9,579,179,187.84/112,179.76
  6. Step 6: Final answer
    x = 85,391.33

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1.5x scale

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.