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Finding the Fourth Proportional to 112,308.40, 154,984.42 and 61,320.97

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Solution

The fourth proportional to 112,308.40, 154,984.42 and 61,320.97 is: 84,622.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,308.40 : 154,984.42 = 61,320.97 : x
  2. Step 2: Convert to fraction form
    112,308.40/154,984.42 = 61,320.97/x
  3. Step 3: Cross multiply
    112,308.40x = 154,984.42 × 61,320.97
  4. Step 4: Simplify right side
    112,308.40x = 9,503,794,969.29
  5. Step 5: Solve for x
    x = 9,503,794,969.29/112,308.40
  6. Step 6: Final answer
    x = 84,622.30

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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.