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Finding the Fourth Proportional to 112,072.40, 168,108.60 and 106,386.20

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Solution

The fourth proportional to 112,072.40, 168,108.60 and 106,386.20 is: 159,579.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,072.40 : 168,108.60 = 106,386.20 : x
  2. Step 2: Convert to fraction form
    112,072.40/168,108.60 = 106,386.20/x
  3. Step 3: Cross multiply
    112,072.40x = 168,108.60 × 106,386.20
  4. Step 4: Simplify right side
    112,072.40x = 17,884,435,141.32
  5. Step 5: Solve for x
    x = 17,884,435,141.32/112,072.40
  6. Step 6: Final answer
    x = 159,579.30

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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.