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Finding the Fourth Proportional to 112,123.87, 154,728.96 and 61,137

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Solution

The fourth proportional to 112,123.87, 154,728.96 and 61,137 is: 84,367.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,123.87 : 154,728.96 = 61,137 : x
  2. Step 2: Convert to fraction form
    112,123.87/154,728.96 = 61,137/x
  3. Step 3: Cross multiply
    112,123.87x = 154,728.96 × 61,137
  4. Step 4: Simplify right side
    112,123.87x = 9,459,664,427.52
  5. Step 5: Solve for x
    x = 9,459,664,427.52/112,123.87
  6. Step 6: Final answer
    x = 84,367.98

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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.