Home / 121,905.54-168,243.82-70,920.43

Finding the Fourth Proportional to 121,905.54, 168,243.82 and 70,920.43

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Solution

The fourth proportional to 121,905.54, 168,243.82 and 70,920.43 is: 97,878.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,905.54 : 168,243.82 = 70,920.43 : x
  2. Step 2: Convert to fraction form
    121,905.54/168,243.82 = 70,920.43/x
  3. Step 3: Cross multiply
    121,905.54x = 168,243.82 × 70,920.43
  4. Step 4: Simplify right side
    121,905.54x = 11,931,923,461.33
  5. Step 5: Solve for x
    x = 11,931,923,461.33/121,905.54
  6. Step 6: Final answer
    x = 97,878.43

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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.