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Finding the Fourth Proportional to 112,431.70, 168,712.35 and 42,361.30

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Solution

The fourth proportional to 112,431.70, 168,712.35 and 42,361.30 is: 63,566.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,431.70 : 168,712.35 = 42,361.30 : x
  2. Step 2: Convert to fraction form
    112,431.70/168,712.35 = 42,361.30/x
  3. Step 3: Cross multiply
    112,431.70x = 168,712.35 × 42,361.30
  4. Step 4: Simplify right side
    112,431.70x = 7,146,874,472.06
  5. Step 5: Solve for x
    x = 7,146,874,472.06/112,431.70
  6. Step 6: Final answer
    x = 63,566.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.