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Finding the Fourth Proportional to 112,178.79, 154,806.80 and 61,877.79

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Solution

The fourth proportional to 112,178.79, 154,806.80 and 61,877.79 is: 85,391.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,178.79 : 154,806.80 = 61,877.79 : x
  2. Step 2: Convert to fraction form
    112,178.79/154,806.80 = 61,877.79/x
  3. Step 3: Cross multiply
    112,178.79x = 154,806.80 × 61,877.79
  4. Step 4: Simplify right side
    112,178.79x = 9,579,102,351.58
  5. Step 5: Solve for x
    x = 9,579,102,351.58/112,178.79
  6. Step 6: Final answer
    x = 85,391.39

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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.