Home / 149,241.69-205,946.64-81,258.45

Finding the Fourth Proportional to 149,241.69, 205,946.64 and 81,258.45

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Solution

The fourth proportional to 149,241.69, 205,946.64 and 81,258.45 is: 112,132.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,241.69 : 205,946.64 = 81,258.45 : x
  2. Step 2: Convert to fraction form
    149,241.69/205,946.64 = 81,258.45/x
  3. Step 3: Cross multiply
    149,241.69x = 205,946.64 × 81,258.45
  4. Step 4: Simplify right side
    149,241.69x = 16,734,904,749.11
  5. Step 5: Solve for x
    x = 16,734,904,749.11/149,241.69
  6. Step 6: Final answer
    x = 112,132.91

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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.