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Finding the Fourth Proportional to 112,179.13, 154,818.13 and 61,878.13

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Solution

The fourth proportional to 112,179.13, 154,818.13 and 61,878.13 is: 85,397.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,179.13 : 154,818.13 = 61,878.13 : x
  2. Step 2: Convert to fraction form
    112,179.13/154,818.13 = 61,878.13/x
  3. Step 3: Cross multiply
    112,179.13x = 154,818.13 × 61,878.13
  4. Step 4: Simplify right side
    112,179.13x = 9,579,855,600.41
  5. Step 5: Solve for x
    x = 9,579,855,600.41/112,179.13
  6. Step 6: Final answer
    x = 85,397.85

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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.