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Finding the Fourth Proportional to 112,179, 154,807.02 and 61,878

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Solution

The fourth proportional to 112,179, 154,807.02 and 61,878 is: 85,391.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,179 : 154,807.02 = 61,878 : x
  2. Step 2: Convert to fraction form
    112,179/154,807.02 = 61,878/x
  3. Step 3: Cross multiply
    112,179x = 154,807.02 × 61,878
  4. Step 4: Simplify right side
    112,179x = 9,579,148,783.56
  5. Step 5: Solve for x
    x = 9,579,148,783.56/112,179
  6. Step 6: Final answer
    x = 85,391.64

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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.